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<ol class="chapter"><li class="chapter-item affix "><a href="../../index.html">Andrew's Blog</a></li><li class="chapter-item "><a href="../../posts/linux/linux.html"><strong aria-hidden="true">1.</strong> linux</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/linux/install_linux.html"><strong aria-hidden="true">1.1.</strong> install linux</a></li><li class="chapter-item "><a href="../../posts/linux/bash_profile.html"><strong aria-hidden="true">1.2.</strong> bash profile</a></li><li class="chapter-item "><a href="../../posts/linux/command_list.html"><strong aria-hidden="true">1.3.</strong> command list</a></li><li class="chapter-item "><a href="../../posts/linux/git_guide.html"><strong aria-hidden="true">1.4.</strong> git guide</a></li><li class="chapter-item "><a href="../../posts/linux/tar.html"><strong aria-hidden="true">1.5.</strong> tar</a></li><li class="chapter-item "><a href="../../posts/linux/run_x86_elf_in_x64_setup.html"><strong aria-hidden="true">1.6.</strong> run x86 elf in x64 setup</a></li></ol></li><li class="chapter-item "><a href="../../posts/mac/mac.html"><strong aria-hidden="true">2.</strong> mac</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/mac/macos_profiles.html"><strong aria-hidden="true">2.1.</strong> macos profiles</a></li></ol></li><li class="chapter-item expanded "><a href="../../posts/swift/swift.html"><strong aria-hidden="true">3.</strong> swift</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/swift/learn_swift.html"><strong aria-hidden="true">3.1.</strong> learn swift basics</a></li><li class="chapter-item "><a href="../../posts/swift/swift_extensions.html"><strong aria-hidden="true">3.2.</strong> Swift extensions</a></li><li class="chapter-item expanded "><a href="../../posts/swift/swiftui_extension.html" class="active"><strong aria-hidden="true">3.3.</strong> SwiftUI extensions</a></li><li class="chapter-item "><a href="../../posts/swift/install_swift.html"><strong aria-hidden="true">3.4.</strong> install swift</a></li><li class="chapter-item "><a href="../../posts/swift/task_planner.html"><strong aria-hidden="true">3.5.</strong> implment task panner app with SwiftUI</a></li><li class="chapter-item "><a href="../../posts/swift/swift_cheat_sheet.html"><strong aria-hidden="true">3.6.</strong> Swift Cheat Sheet</a></li><li class="chapter-item "><a href="../../posts/swift/yinci_url.html"><strong aria-hidden="true">3.7.</strong> Personal privacy protocol</a></li><li class="chapter-item "><a href="../../posts/swift/swift_regular_exressions.html"><strong aria-hidden="true">3.8.</strong> Swift regular exressions</a></li><li class="chapter-item "><a href="../../posts/ios/how_to_create_beautiful_ios_charts_in_swift.html"><strong aria-hidden="true">3.9.</strong> How to Create Beautiful iOS Charts in鑱絊wift</a></li><li class="chapter-item "><a href="../../posts/swift/swiftui_source_code.html"><strong aria-hidden="true">3.10.</strong> SwiftUI source code</a></li><li class="chapter-item "><a href="../../posts/swift/use_swift_fetch_iciba_api.html"><strong aria-hidden="true">3.11.</strong> use swift fetch iciba API</a></li></ol></li><li class="chapter-item "><a href="../../posts/ios/ios.html"><strong aria-hidden="true">4.</strong> ios</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/ios/cocaposd_setup_and_install_for_ios_project.html"><strong aria-hidden="true">4.1.</strong> cocaposd setup and install for ios project</a></li><li class="chapter-item "><a href="../../posts/ios/swiftui_show_gif_image.html"><strong aria-hidden="true">4.2.</strong> SwiftUI show gif image</a></li><li class="chapter-item "><a href="../../posts/ios/implement_task_planner_app.html"><strong aria-hidden="true">4.3.</strong> implement Task planner App</a></li></ol></li><li class="chapter-item "><a href="../../posts/objective_c/objective_c.html"><strong aria-hidden="true">5.</strong> objective_c</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/objective_c/objective_c_cheat_sheet.html"><strong aria-hidden="true">5.1.</strong> Objective-C Cheat Sheet</a></li><li class="chapter-item "><a href="../../posts/objective_c/objective_c_for_absolute_beginners_read_note.html"><strong aria-hidden="true">5.2.</strong> Objective-C Note</a></li></ol></li><li class="chapter-item "><a href="../../posts/dart/dart.html"><strong aria-hidden="true">6.</strong> dart</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/dart/flutter.html"><strong aria-hidden="true">6.1.</strong> Flutter Cheat Sheet</a></li><li class="chapter-item "><a href="../../posts/dart/dart_cheat_sheet.html"><strong aria-hidden="true">6.2.</strong> Dart Cheat Sheet</a></li><li class="chapter-item "><a href="../../posts/flutter/flutter_dev_test.html"><strong aria-hidden="true">6.3.</strong> Flutter dev test</a></li></ol></li><li class="chapter-item "><a href="../../posts/rust/rust.html"><strong aria-hidden="true">7.</strong> rust</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/rust/offline_use_rust.html"><strong aria-hidden="true">7.1.</strong> Offline use rust</a></li><li class="chapter-item "><a href="../../posts/rust/rust_grammer.html"><strong aria-hidden="true">7.2.</strong> rust grammar</a></li><li class="chapter-item "><a href="../../posts/rust/pase_string_and_decimal_conversion.html"><strong aria-hidden="true">7.3.</strong> pase string and decimal conversion</a></li><li class="chapter-item "><a href="../../posts/rust/parse_types.html"><strong aria-hidden="true">7.4.</strong> rust types</a></li><li class="chapter-item "><a href="../../posts/rust/rust_life_cycle.html"><strong aria-hidden="true">7.5.</strong> Rust life cycle</a></li><li class="chapter-item "><a href="../../posts/rust/rust_generic.html"><strong aria-hidden="true">7.6.</strong> rust generics</a></li><li class="chapter-item "><a href="../../posts/rust/rust_implment_matrix.html"><strong aria-hidden="true">7.7.</strong> Rust implement matrix</a></li><li class="chapter-item "><a href="../../posts/rust/rust_sort.html"><strong aria-hidden="true">7.8.</strong> Rust implement sort algorithms</a></li><li class="chapter-item "><a href="../../posts/rust/implement_aes_encryption.html"><strong aria-hidden="true">7.9.</strong> Rust implement AEC encryption and decryption</a></li><li class="chapter-item "><a href="../../posts/rust/implement_trie_data_structure.html"><strong aria-hidden="true">7.10.</strong> implement trie data structure</a></li><li class="chapter-item "><a href="../../posts/rust/rust_implement_tree.html"><strong aria-hidden="true">7.11.</strong> implement tree data_structure</a></li><li class="chapter-item "><a href="../../posts/rust/list_dir.html"><strong aria-hidden="true">7.12.</strong> list dir</a></li><li class="chapter-item "><a href="../../posts/rust/fast_way_to_implment_object_trait.html"><strong aria-hidden="true">7.13.</strong> fast way to implment object trait</a></li><li class="chapter-item "><a href="../../posts/rust/compress_rust_binary_size.html"><strong aria-hidden="true">7.14.</strong> compress rust binary size</a></li><li class="chapter-item "><a href="../../posts/rust/implment_file_upload_backend.html"><strong aria-hidden="true">7.15.</strong> impliment file upload</a></li><li class="chapter-item "><a href="../../posts/rust/this_is_add_post_cli_implementation_in_rust.html"><strong aria-hidden="true">7.16.</strong> this is add_post cli implementation in rust</a></li><li class="chapter-item "><a href="../../posts/rust/use_rust_implment_a_copyclipbord_cli.html"><strong aria-hidden="true">7.17.</strong> Use rust implment a copyclipbord CLI</a></li><li class="chapter-item "><a href="../../posts/rust/sqlite_database_add_delete_update_show_in_rust.html"><strong aria-hidden="true">7.18.</strong> sqlite database add delete update show in rust</a></li><li class="chapter-item "><a href="../../posts/rust/implementing_tokio_joinhandle_for_wasm.html"><strong aria-hidden="true">7.19.</strong> Implementing tokio JoinHandle for wasm</a></li><li class="chapter-item "><a href="../../posts/rust/rust_implement_a_crate_for_encode_and_decode_brainfuck_and_ook.html"><strong aria-hidden="true">7.20.</strong> rust implement a crate for encode and decode brainfuck and ook</a></li><li class="chapter-item "><a href="../../posts/rust/slint_builtin_elements.html"><strong aria-hidden="true">7.21.</strong> Slint Builtin Elements</a></li><li class="chapter-item "><a href="../../posts/rust/corporate_network_install_rust_on_windows.html"><strong aria-hidden="true">7.22.</strong> Corporate network install Rust on windows</a></li><li class="chapter-item "><a href="../../posts/rust/rust_binary_file_how_to_judge_static_link_or_dynamic_link_in_macos.html"><strong aria-hidden="true">7.23.</strong> rust binary file how to judge static link or dynamic link in Macos</a></li><li class="chapter-item "><a href="../../posts/rust/rust_binary_include_dir_and_get_contents.html"><strong aria-hidden="true">7.24.</strong> rust binary include dir and get contents</a></li><li class="chapter-item "><a href="../../posts/rust/rust_logger_non-block.html"><strong aria-hidden="true">7.25.</strong> rust logger non-block</a></li><li class="chapter-item "><a href="../../posts/rust/rust_connect_sql_server_database.html"><strong aria-hidden="true">7.26.</strong> rust connect sql server database</a></li><li class="chapter-item "><a href="../../posts/rust/rust_websocket_implment.html"><strong aria-hidden="true">7.27.</strong> rust websocket implment</a></li></ol></li><li class="chapter-item "><a href="../../posts/java/java.html"><strong aria-hidden="true">8.</strong> java</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/java/java_grammar.html"><strong aria-hidden="true">8.1.</strong> java grammar and codewar</a></li><li class="chapter-item "><a href="../../posts/java/run_jar.html"><strong aria-hidden="true">8.2.</strong> java run .jar</a></li><li class="chapter-item "><a href="../../posts/java/java_pomxml_add_defaultgoal_to_build.html"><strong aria-hidden="true">8.3.</strong> Java pomxml add defaultGoal to build</a></li><li class="chapter-item "><a href="../../posts/java/java_set_mvn_mirror.html"><strong aria-hidden="true">8.4.</strong> Java set mvn mirror</a></li></ol></li><li class="chapter-item "><a href="../../posts/python/python.html"><strong aria-hidden="true">9.</strong> python</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/python/convert_pesn.html"><strong aria-hidden="true">9.1.</strong> convert pesn</a></li><li class="chapter-item "><a href="../../posts/python/find_remove_dir.html"><strong aria-hidden="true">9.2.</strong> find and remove dir</a></li><li class="chapter-item "><a href="../../posts/python/timing_message.html"><strong aria-hidden="true">9.3.</strong> wechat send message</a></li><li class="chapter-item "><a href="../../posts/python/use_python_openpyxl_package_read_and_edit_excel_files.html"><strong aria-hidden="true">9.4.</strong> Use python openpyxl package read and edit excel files</a></li></ol></li><li class="chapter-item "><a href="../../posts/go/go.html"><strong aria-hidden="true">10.</strong> go</a></li><li class="chapter-item "><a href="../../posts/js/js.html"><strong aria-hidden="true">11.</strong> js</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/js/js_tutorial.html"><strong aria-hidden="true">11.1.</strong> js tutorial</a></li><li class="chapter-item "><a href="../../posts/js/js_tutorial_map.html"><strong aria-hidden="true">11.2.</strong> ja map</a></li><li class="chapter-item "><a href="../../posts/js/js_tutorial_math.html"><strong aria-hidden="true">11.3.</strong> js math</a></li><li class="chapter-item "><a href="../../posts/js/js_tutorial_object.html"><strong aria-hidden="true">11.4.</strong> js object</a></li><li class="chapter-item "><a href="../../posts/js/js_tutorial_set.html"><strong aria-hidden="true">11.5.</strong> js set</a></li><li class="chapter-item "><a href="../../posts/js/single_thread_and_asynchronous.html"><strong aria-hidden="true">11.6.</strong> single thread and asynchronous</a></li><li class="chapter-item "><a href="../../posts/js/this.html"><strong aria-hidden="true">11.7.</strong> js this</a></li><li class="chapter-item "><a href="../../posts/js/js_implment_aes.html"><strong aria-hidden="true">11.8.</strong> js implment aes</a></li><li class="chapter-item "><a href="../../posts/js/getting_started_with_ajax.html"><strong aria-hidden="true">11.9.</strong> getting started with ajax</a></li><li class="chapter-item "><a href="../../posts/js/BinarySearchTree.html"><strong aria-hidden="true">11.10.</strong> binary search tree</a></li><li class="chapter-item "><a href="../../posts/js/goole_zx.html"><strong aria-hidden="true">11.11.</strong> goole zx</a></li><li class="chapter-item "><a href="../../posts/js/es6.html"><strong aria-hidden="true">11.12.</strong> es6</a></li></ol></li><li class="chapter-item "><a href="../../posts/ruby/ruby.html"><strong aria-hidden="true">12.</strong> ruby</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/ruby/rails_setup_env.html"><strong aria-hidden="true">12.1.</strong> ruby on rails setup environment</a></li><li class="chapter-item "><a href="../../posts/ruby/learn_ruby.html"><strong aria-hidden="true">12.2.</strong> learn ruby</a></li><li class="chapter-item "><a href="../../posts/ruby/ruby_note.html"><strong aria-hidden="true">12.3.</strong> Ruby Note</a></li><li class="chapter-item "><a href="../../posts/ruby/setup_ruby_for_ctf.html"><strong aria-hidden="true">12.4.</strong> Setup ruby for CTF</a></li></ol></li><li class="chapter-item "><a href="../../posts/react/react.html"><strong aria-hidden="true">13.</strong> react</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/react/react_life_cycle.html"><strong aria-hidden="true">13.1.</strong> react life cycle</a></li><li class="chapter-item "><a href="../../posts/react/react_router.html"><strong aria-hidden="true">13.2.</strong> react router</a></li><li class="chapter-item "><a href="../../posts/react/react_this.html"><strong aria-hidden="true">13.3.</strong> react this</a></li><li class="chapter-item "><a href="../../posts/react/react_interviw.html"><strong aria-hidden="true">13.4.</strong> react interview</a></li><li class="chapter-item "><a href="../../posts/react/important_react_interview.html"><strong aria-hidden="true">13.5.</strong> important react interview</a></li><li class="chapter-item "><a href="../../posts/react/react_quick_reference.html"><strong aria-hidden="true">13.6.</strong> react quick reference</a></li><li class="chapter-item "><a href="../../posts/react/redux_quick_reference.html"><strong aria-hidden="true">13.7.</strong> redux quick reference</a></li></ol></li><li class="chapter-item "><a href="../../posts/vue/vue.html"><strong aria-hidden="true">14.</strong> vue</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/vue/vue_ajax.html"><strong aria-hidden="true">14.1.</strong> vue ajax</a></li></ol></li><li class="chapter-item "><a href="../../posts/angular/angular.html"><strong aria-hidden="true">15.</strong> angular</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/angular/controller_communication.html"><strong aria-hidden="true">15.1.</strong> controller communication</a></li><li class="chapter-item "><a href="../../posts/angular/creating_custom_directives.html"><strong aria-hidden="true">15.2.</strong> creating custom directives</a></li><li class="chapter-item "><a href="../../posts/angular/directive_notes.html"><strong aria-hidden="true">15.3.</strong> directive notes</a></li><li class="chapter-item "><a href="../../posts/angular/directive_communication.html"><strong aria-hidden="true">15.4.</strong> directive communication</a></li><li class="chapter-item "><a href="../../posts/angular/post_params.html"><strong aria-hidden="true">15.5.</strong> post params</a></li><li class="chapter-item "><a href="../../posts/angular/read_json_angular.html"><strong aria-hidden="true">15.6.</strong> read json angular</a></li><li class="chapter-item "><a href="../../posts/angular/same_route_reload.html"><strong aria-hidden="true">15.7.</strong> same route reload</a></li></ol></li><li class="chapter-item "><a href="../../posts/css/css.html"><strong aria-hidden="true">16.</strong> css</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/css/use_css_media.html"><strong aria-hidden="true">16.1.</strong> use css media</a></li></ol></li><li class="chapter-item "><a href="../../posts/php/php.html"><strong aria-hidden="true">17.</strong> php</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/php/for_php_string_implment_some_extemtion_functions.html"><strong aria-hidden="true">17.1.</strong> for php string implment some extemtion functions</a></li><li class="chapter-item "><a href="../../posts/php/php_cheatsheet.html"><strong aria-hidden="true">17.2.</strong> PHP cheatsheet</a></li></ol></li><li class="chapter-item "><a href="../../posts/leetcode/leetcode.html"><strong aria-hidden="true">18.</strong> leetcode</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/leetcode/rust_leetcode.html"><strong aria-hidden="true">18.1.</strong> rust leetcode</a></li><li class="chapter-item "><a href="../../posts/leetcode/rust_codewar.html"><strong aria-hidden="true">18.2.</strong> rust codewar</a></li><li class="chapter-item "><a href="../../posts/leetcode/swift_codewar.html"><strong aria-hidden="true">18.3.</strong> swift codewar</a></li><li class="chapter-item "><a href="../../posts/leetcode/js_leetcode.html"><strong aria-hidden="true">18.4.</strong> js leetcode</a></li><li class="chapter-item "><a href="../../posts/leetcode/java_leetcode.html"><strong aria-hidden="true">18.5.</strong> java leetcode</a></li><li class="chapter-item "><a href="../../posts/leetcode/rust_huawei.html"><strong aria-hidden="true">18.6.</strong> huawei test</a></li><li class="chapter-item "><a href="../../posts/leetcode/rust_utils.html"><strong aria-hidden="true">18.7.</strong> rust common functions</a></li><li class="chapter-item "><a href="../../posts/leetcode/olympiad_training.html"><strong aria-hidden="true">18.8.</strong> Computer olympiad training</a></li></ol></li><li class="chapter-item "><a href="../../posts/ctf/CTF.html"><strong aria-hidden="true">19.</strong> ctf</a><a class="toggle"><div>❱</div></a></li><li><ol class="section"><li class="chapter-item "><a href="../../posts/ctf/CTF_Note.html"><strong aria-hidden="true">19.1.</strong> CTF Note</a></li><li class="chapter-item "><a href="../../posts/ctf/0.1_Web.html"><strong aria-hidden="true">19.2.</strong> Web</a></li><li class="chapter-item "><a href="../../posts/ctf/4.1_Misc.html"><strong aria-hidden="true">19.3.</strong> Misc</a></li><li class="chapter-item "><a href="../../posts/ctf/3.2_PWN_note.html"><strong aria-hidden="true">19.4.</strong> PWN</a></li><li class="chapter-item "><a href="../../posts/ctf/3.1_Crypto.html"><strong aria-hidden="true">19.5.</strong> Crypto</a></li><li class="chapter-item "><a href="../../posts/ctf/3.4_RSA_note.html"><strong aria-hidden="true">19.6.</strong> Rsa attack</a></li><li class="chapter-item "><a href="../../posts/ctf/3.5_Base64.html"><strong aria-hidden="true">19.7.</strong> Base64</a></li><li class="chapter-item "><a href="../../posts/ctf/0.0_SQL Injection Cheatsheet.html"><strong aria-hidden="true">19.8.</strong> SQL Injection Cheatsheet</a></li><li class="chapter-item "><a href="../../posts/ctf/1.1_SQL_injection.html"><strong aria-hidden="true">19.9.</strong> SQL Injection</a></li><li class="chapter-item "><a href="../../posts/ctf/1.2_SQL_injection_UNION_attacks.html"><strong aria-hidden="true">19.10.</strong> SQL Injection UNION attacks</a></li><li class="chapter-item "><a href="../../posts/ctf/1.3_Blind SQL injection.html"><strong aria-hidden="true">19.11.</strong> Blind SQL Injection</a></li><li class="chapter-item "><a href="../../posts/ctf/1.4_Code Injection.html"><strong aria-hidden="true">19.12.</strong> Code Injection</a></li><li class="chapter-item "><a href="../../posts/ctf/1.5_SSRF.html"><strong aria-hidden="true">19.13.</strong> SSRF</a></li><li class="chapter-item "><a href="../../posts/ctf/1.6_OS command injection.html"><strong aria-hidden="true">19.14.</strong> OS command injection</a></li><li class="chapter-item "><a href="../../posts/ctf/1.7_Local file inclusion.html"><strong aria-hidden="true">19.15.</strong> Local file inclusion</a></li><li class="chapter-item "><a href="../../posts/ctf/1.8_Remote file inclusion.html"><strong aria-hidden="true">19.16.</strong> Remote file inclusion</a></li><li class="chapter-item "><a href="../../posts/ctf/1.9_CSRFm.html"><strong aria-hidden="true">19.17.</strong> CSRF</a></li><li class="chapter-item "><a href="../../posts/ctf/1.10_NoSQL injection.html"><strong aria-hidden="true">19.18.</strong> NoSQL injection</a></li><li class="chapter-item "><a href="../../posts/ctf/1.11_JSON injection.html"><strong aria-hidden="true">19.19.</strong> JSON injection</a></li><li class="chapter-item "><a href="../../posts/ctf/1.12_CTF_Web_SQL_Note.html"><strong aria-hidden="true">19.20.</strong> CTF Web SQL Note</a></li><li class="chapter-item "><a href="../../posts/ctf/2.1_XXE.html"><strong aria-hidden="true">19.21.</strong> XXE</a></li><li class="chapter-item "><a href="../../posts/ctf/2.2_XSS.html"><strong aria-hidden="true">19.22.</strong> XSS</a></li><li class="chapter-item "><a href="../../posts/ctf/2.3_Upload File.html"><strong aria-hidden="true">19.23.</strong> Upload File</a></li><li class="chapter-item "><a href="../../posts/ctf/2.4_serialize_unserialize.html"><strong aria-hidden="true">19.24.</strong> serialize unserialize</a></li><li class="chapter-item "><a href="../../posts/ctf/2.5_Race condition.html"><strong aria-hidden="true">19.25.</strong> Race condition</a></li><li class="chapter-item "><a href="../../posts/ctf/3.2_PWN_note.html"><strong aria-hidden="true">19.26.</strong> PWN_note</a></li><li class="chapter-item "><a href="../../posts/ctf/3.3_pwn HCTF2016 brop.html"><strong aria-hidden="true">19.27.</strong> pwn HCTF2016 brop</a></li><li class="chapter-item "><a href="../../posts/ctf/pwn_patch_defense_skill.html"><strong aria-hidden="true">19.28.</strong> PWN Patch defense skill</a></li><li class="chapter-item "><a href="../../posts/ctf/pwn_stack_overflow.html"><strong aria-hidden="true">19.29.</strong> PWN stack overflow</a></li><li class="chapter-item "><a href="../../posts/ctf/pwn_heap_overflow.html"><strong aria-hidden="true">19.30.</strong> PWN heap overflow</a></li><li class="chapter-item "><a href="../../posts/ctf/pwn_format_string_vulnerability.html"><strong aria-hidden="true">19.31.</strong> PWN Format String Vulnerability</a></li><li class="chapter-item "><a href="../../posts/ctf/kali_linux_tutorials.html"><strong aria-hidden="true">19.32.</strong> Kali linux tutorials</a></li><li class="chapter-item "><a href="../../posts/ctf/google_dorks_2023_lists.html"><strong aria-hidden="true">19.33.</strong> Google Dorks 2023 Lists</a></li><li class="chapter-item "><a href="../../posts/ctf/dvwa_writeup.html"><strong aria-hidden="true">19.34.</strong> DVWA WriteUp</a></li><li class="chapter-item "><a href="../../posts/ctf/bwapp_writeup.html"><strong aria-hidden="true">19.35.</strong> bWAPP WriteUp</a></li><li class="chapter-item "><a href="../../posts/ctf/sqlilabs_writeup.html"><strong aria-hidden="true">19.36.</strong> sqlilabs WriteUp</a></li><li class="chapter-item "><a href="../../posts/ctf/ctf_train_at_hangzhou.html"><strong aria-hidden="true">19.37.</strong> ctf train at hangzhou</a></li><li class="chapter-item "><a href="../../posts/ctf/ctf_common_mindmap_list.html"><strong aria-hidden="true">19.38.</strong> ctf common mindmap list</a></li><li class="chapter-item "><a href="../../posts/ctf/error_based_sql_injection.html"><strong aria-hidden="true">19.39.</strong> Error Based SQL Injection</a></li><li class="chapter-item "><a href="../../posts/ctf/urlfinder_tutorial.html"><strong aria-hidden="true">19.40.</strong> URLFinder Tutorial</a></li><li class="chapter-item "><a href="../../posts/ctf/observer_ward_tutorial.html"><strong aria-hidden="true">19.41.</strong> observer_ward Tutorial</a></li><li class="chapter-item "><a href="../../posts/ctf/mysql_udf_.html"><strong aria-hidden="true">19.42.</strong> MySQL UDF 提权</a></li><li class="chapter-item "><a href="../../posts/ctf/nuclei__tutorial.html"><strong aria-hidden="true">19.43.</strong> Nuclei Tutorial</a></li><li class="chapter-item "><a href="../../posts/ctf/2024_ctf_solution_thinking.html"><strong aria-hidden="true">19.44.</strong> 2024 ctf solution thinking</a></li><li class="chapter-item "><a href="../../posts/ctf/man_che_si_te_bian_ma.html"><strong aria-hidden="true">19.45.</strong> 曼彻斯特编码</a></li></ol></li></ol>
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<!-- Track and set sidebar scroll position -->
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<script>
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var sidebarScrollbox = document.querySelector('#sidebar .sidebar-scrollbox');
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sidebarScrollbox.addEventListener('click', function(e) {
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if (e.target.tagName === 'A') {
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sessionStorage.setItem('sidebar-scroll', sidebarScrollbox.scrollTop);
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var sidebarScrollTop = sessionStorage.getItem('sidebar-scroll');
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sessionStorage.removeItem('sidebar-scroll');
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if (sidebarScrollTop) {
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// preserve sidebar scroll position when navigating via links within sidebar
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sidebarScrollbox.scrollTop = sidebarScrollTop;
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} else {
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// scroll sidebar to current active section when navigating via "next/previous chapter" buttons
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<li role="none"><button role="menuitem" class="theme" id="light">Light</button></li>
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<h1 class="menu-title">Andrew's Blog</h1>
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<input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
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<div id="content" class="content">
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<main>
|
||
<h1 id="swiftui-extensions"><a class="header" href="#swiftui-extensions">SwiftUI extensions</a></h1>
|
||
<h2 id="for-swiftui-view"><a class="header" href="#for-swiftui-view">for SwiftUI View</a></h2>
|
||
<pre><code class="language-swift">import SwiftUI
|
||
import Combine
|
||
extension View {
|
||
//readSize
|
||
func readSize(onChange: @escaping (CGSize) -> Void) -> some View {
|
||
background(
|
||
GeometryReader { geometryProxy in
|
||
Color.clear
|
||
.preference(key: ReadSizePreferenceKey.self, value: geometryProxy.size)
|
||
}
|
||
)
|
||
.onPreferenceChange(ReadSizePreferenceKey.self, perform: onChange)
|
||
}
|
||
}
|
||
//ReadSizePreferenceKey
|
||
private struct ReadSizePreferenceKey: PreferenceKey {
|
||
static var defaultValue: CGSize = .zero
|
||
static func reduce(value: inout CGSize, nextValue: () -> CGSize) {}
|
||
}
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
public extension View {
|
||
/// toImage
|
||
func toImage() -> UIImage? {
|
||
let controller = UIHostingController(rootView: self)
|
||
|
||
let view = controller.view
|
||
view?.backgroundColor = .clear
|
||
|
||
let size = controller.sizeThatFits(in: UIScreen.main.bounds.size)
|
||
controller.view.bounds = CGRect(origin: .zero, size: size)
|
||
|
||
let renderer = UIGraphicsImageRenderer(size: size)
|
||
let image = renderer.image { _ in
|
||
view?.drawHierarchy(in: controller.view.bounds, afterScreenUpdates: true)
|
||
}
|
||
|
||
return image
|
||
}
|
||
|
||
/// Type casting to AnyView
|
||
///
|
||
/// myView.eraseToAnyView()
|
||
///
|
||
/// - Returns: A view as AnyView
|
||
@inlinable func eraseToAnyView() -> AnyView {
|
||
AnyView(self)
|
||
}
|
||
/// Encapsulate view in navigation view
|
||
///
|
||
/// myView.embedInNavigation()
|
||
///
|
||
/// - Returns: A view encapsulate in navigation view
|
||
@available(watchOS, unavailable)
|
||
@inlinable func embedInNavigation() -> some View {
|
||
NavigationView { self }
|
||
}
|
||
/// Positions the view within an invisible frame with the specified size.
|
||
///
|
||
/// myView.frame(size: CGSize(width: 100, height: 100))
|
||
///
|
||
/// - Returns: A view with fixed dimensions of width and height
|
||
@inlinable func frame(size: CGSize) -> some View {
|
||
frame(width: size.width, height: size.height)
|
||
}
|
||
/// Calls a block each time that view is reloaded
|
||
///
|
||
/// content.onReload(perform: {
|
||
/// print("onReload")
|
||
/// })
|
||
///
|
||
/// - Returns: The same view but calling the block asynchronously when is reloaded
|
||
@inlinable func onReload(perform: @escaping () -> Void) -> some View {
|
||
DispatchQueue.main.async {
|
||
perform()
|
||
}
|
||
return self
|
||
}
|
||
}
|
||
// MARK: Building
|
||
public extension View {
|
||
/// Apply changes to the view if the condition is true
|
||
///
|
||
/// myView
|
||
/// .if(index == state.currentIndex, then: {
|
||
/// $0.background(Color.red)
|
||
/// })
|
||
///
|
||
/// - Parameters:
|
||
/// - condition: an boolean to control the condition
|
||
/// - then: callback to apply the changes when the condition is true
|
||
/// - Returns: some View
|
||
@inlinable func `if`<Content: View>(
|
||
_ conditional: Bool,
|
||
then: (Self) -> Content
|
||
) -> TupleView<(Self?, Content?)> {
|
||
if conditional {
|
||
return TupleView((nil, then(self)))
|
||
}
|
||
return TupleView((self, nil))
|
||
}
|
||
/// Apply some changes to the view in place of the condition
|
||
///
|
||
/// myView
|
||
/// .if(index == state.currentIndex, then: {
|
||
/// $0.background(Color.red)
|
||
/// }, else: {
|
||
/// $0.background(Color.yellow)
|
||
/// })
|
||
///
|
||
/// - Parameters:
|
||
/// - condition: an boolean to control the condition
|
||
/// - then: callback to apply the changes when the condition is true
|
||
/// - else: callback to apply the changes when the condition is false
|
||
/// - Returns: some View
|
||
@inlinable func `if`<A: View, B: View>(
|
||
_ conditional: Bool,
|
||
then: (Self) -> A,
|
||
`else`: (Self) -> B
|
||
) -> TupleView<(A?, B?)> {
|
||
if conditional {
|
||
return TupleView((then(self), nil))
|
||
}
|
||
return TupleView((nil, `else`(self)))
|
||
}
|
||
}
|
||
// MARK: Modifiers
|
||
public extension View {
|
||
/// Set one modifier conditionally.
|
||
///
|
||
/// myView.conditionalModifier(myCondition, myViewModifier)
|
||
///
|
||
/// - Parameters:
|
||
/// - condition: an boolean to control the condition
|
||
/// - modifier: modifier to apply
|
||
/// - Returns: some View
|
||
@inlinable func conditionalModifier<M: ViewModifier>(
|
||
_ condition: Bool,
|
||
_ modifier: M
|
||
) -> TupleView<(Self?, ModifiedContent<Self, M>?)> {
|
||
if condition {
|
||
return TupleView((nil, self.modifier(modifier)))
|
||
}
|
||
return TupleView((self, nil))
|
||
}
|
||
/// Set one modifier or another conditionally.
|
||
///
|
||
/// myView.conditionalModifier(myCondition, firstViewModifier, secondViewModifier)
|
||
///
|
||
/// - Parameters:
|
||
/// - condition: an boolean to control the condition
|
||
/// - trueModifier: modifier to apply when the condition is true
|
||
/// - falseModifier: modifier to apply when the condition is false
|
||
/// - Returns: some View
|
||
@inlinable func conditionalModifier<M: ViewModifier>(
|
||
_ condition: Bool,
|
||
_ trueModifier: M,
|
||
_ falseModifier: M
|
||
) -> TupleView<(ModifiedContent<Self, M>?, ModifiedContent<Self, M>?)> {
|
||
if condition {
|
||
return TupleView((self.modifier(trueModifier), nil))
|
||
}
|
||
return TupleView((nil, self.modifier(falseModifier)))
|
||
}
|
||
}
|
||
// MARK: Animations
|
||
public extension View {
|
||
/// Animate an action with an animation on appear.
|
||
///
|
||
/// myView.animateOnAppear(using: .easeInOut) { self.scale = 0.5 }
|
||
///
|
||
/// - Parameters:
|
||
/// - animation: animation to be applied
|
||
/// - action: action to be animated
|
||
/// - Returns: some View
|
||
@inlinable func animateOnAppear(using animation: Animation = .easeInOut,
|
||
action: @escaping () -> Void) -> some View {
|
||
return onAppear {
|
||
withAnimation(animation) {
|
||
action()
|
||
}
|
||
}
|
||
}
|
||
/// Animate an action with an animation on disappear.
|
||
///
|
||
/// myView.animateOnDisappear(using: .easeInOut) { self.scale = 0.5 }
|
||
///
|
||
/// - Parameters:
|
||
/// - animation: animation to be applied
|
||
/// - action: action to be animated
|
||
/// - Returns: some View
|
||
@inlinable func animateOnDisappear(using animation: Animation = .easeInOut,
|
||
action: @escaping () -> Void) -> some View {
|
||
return onDisappear {
|
||
withAnimation(animation) {
|
||
action()
|
||
}
|
||
}
|
||
}
|
||
}
|
||
// MARK: Combine
|
||
public extension View {
|
||
/// Bind publisher to state
|
||
///
|
||
/// The following example uses this method to implement an async image view.
|
||
/// ```
|
||
/// struct AsyncImage: View {
|
||
/// @State private var image: UIImage
|
||
/// private let source: AnyPublisher<UIImage, Never>
|
||
/// private let animation: Animation?
|
||
///
|
||
/// init(
|
||
/// source: AnyPublisher<UIImage, Never>,
|
||
/// placeholder: UIImage,
|
||
/// animation: Animation? = nil
|
||
/// ) {
|
||
/// self.source = source
|
||
/// self.animation = animation
|
||
/// self._image = State(initialValue:placeholder)
|
||
/// }
|
||
///
|
||
/// var body: some View {
|
||
/// return Image(uiImage: image)
|
||
/// .resizable()
|
||
/// .bind(source, to: $image.animation(animation))
|
||
/// }
|
||
/// }
|
||
/// ```
|
||
///
|
||
/// - Parameters:
|
||
/// - publisher: publisher to observe when a value is received
|
||
/// - state: state to assign the new value
|
||
/// - Returns: some View
|
||
@inlinable func bind<P: Publisher, Value>(
|
||
_ publisher: P,
|
||
to state: Binding<Value>
|
||
) -> some View where P.Failure == Never, P.Output == Value {
|
||
return onReceive(publisher) { value in
|
||
state.wrappedValue = value
|
||
}
|
||
}
|
||
}
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
public extension View {
|
||
/// Tracks the size available for the view
|
||
///
|
||
/// myView.sizeTrackable($size)
|
||
///
|
||
/// - Parameter size: This binding will receive the size updates
|
||
@inlinable func sizeTrackable(_ size: Binding<CGSize>) -> some View {
|
||
self.modifier(SizeViewModifier(size: size))
|
||
}
|
||
}
|
||
</code></pre>
|
||
<h2 id="for-swiftui-lineargradient"><a class="header" href="#for-swiftui-lineargradient">for SwiftUI LinearGradient</a></h2>
|
||
<pre><code class="language-swift">import SwiftUI
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
public extension LinearGradient {
|
||
/// Create a gradient directly from colors
|
||
///
|
||
/// let myGradient = LinearGradient(Color.red, Color.blue)
|
||
///
|
||
/// - Parameters:
|
||
/// - colors: array of colors
|
||
/// - startPoint: unit point where gradient starts
|
||
/// - endPoint: unit point where gradient starts
|
||
/// - Returns: A new linear gradient
|
||
@inlinable init(_ colors: Color..., startPoint: UnitPoint = .topLeading, endPoint: UnitPoint = .bottomTrailing) {
|
||
self.init(gradient: Gradient(colors: colors), startPoint: startPoint, endPoint: endPoint)
|
||
}
|
||
}
|
||
</code></pre>
|
||
<h2 id="for-swiftui-image"><a class="header" href="#for-swiftui-image">for SwiftUI Image</a></h2>
|
||
<pre><code class="language-swift">import SwiftUI
|
||
#if canImport(UIKit)
|
||
@available(iOS 13.0, tvOS 13.0, watchOS 6.0, *)
|
||
public extension Image {
|
||
/// Create a image with default one
|
||
///
|
||
/// let image = Image("photo", defaultImage: "empty-photo")
|
||
///
|
||
/// - Parameters:
|
||
/// - name: Image name
|
||
/// - defaultImage: Default image name
|
||
/// - Returns: A new image
|
||
@inlinable init(_ name: String, defaultImage: String) {
|
||
if let img = UIImage(named: name) {
|
||
self.init(uiImage: img)
|
||
} else {
|
||
self.init(defaultImage)
|
||
}
|
||
}
|
||
/// Create a image with default one
|
||
///
|
||
/// let image = Image("photo", defaultSystemImage: "bandage.fill")
|
||
///
|
||
/// - Parameters:
|
||
/// - name: Image name
|
||
/// - defaultSystemImage: Default system image name
|
||
/// - Returns: A new image
|
||
@available(OSX 10.15, *)
|
||
@inlinable init(_ name: String, defaultSystemImage: String) {
|
||
if let img = UIImage(named: name) {
|
||
self.init(uiImage: img)
|
||
} else {
|
||
self.init(systemName: defaultSystemImage)
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
#if canImport(AppKit)
|
||
@available(OSX 10.15, *)
|
||
public extension Image {
|
||
/// Create a image with default one
|
||
///
|
||
/// let image = Image("photo", defaultImage: "empty-photo")
|
||
///
|
||
/// - Parameters:
|
||
/// - name: Image name
|
||
/// - defaultImage: Default image name
|
||
/// - Returns: A new image
|
||
@inlinable init(_ name: String, defaultImage: String) {
|
||
if let img = NSImage(named: name) {
|
||
self.init(nsImage: img)
|
||
} else {
|
||
self.init(defaultImage)
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
</code></pre>
|
||
<h2 id="for-swiftui-color"><a class="header" href="#for-swiftui-color">for SwiftUI Color</a></h2>
|
||
<pre><code class="language-swift">import SwiftUI
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
public extension Color {
|
||
/// Create a color from hex string
|
||
/// It supports hex string of rgb and rgba with the # character as optional
|
||
/// Examples: #AABBCC, AABBCC, #AABBCCFF or AABBCCFF.
|
||
///
|
||
/// let myGradient = Color(hex: "#FFFFFF")
|
||
///
|
||
/// - Parameters:
|
||
/// - hex: Hex color string
|
||
/// - Returns: New color from the hex value
|
||
@inlinable init?(hex: String) {
|
||
let hexColor: String
|
||
if hex.hasPrefix("#") {
|
||
let start = hex.index(hex.startIndex, offsetBy: 1)
|
||
hexColor = String(hex[start...])
|
||
} else {
|
||
hexColor = hex
|
||
}
|
||
let count = hexColor.count
|
||
guard count == 6 || count == 8 else {
|
||
return nil
|
||
}
|
||
let scanner = Scanner(string: hexColor)
|
||
var hexNumber: UInt64 = 0
|
||
guard scanner.scanHexInt64(&hexNumber) else {
|
||
return nil
|
||
}
|
||
let r, g, b, a: Double
|
||
if count == 6 { //rgb
|
||
r = Double((hexNumber & 0x00ff0000) >> 16)
|
||
g = Double((hexNumber & 0x0000ff00) >> 8)
|
||
b = Double(hexNumber & 0x000000ff)
|
||
a = 255
|
||
} else { //rgba
|
||
r = Double((hexNumber & 0xff000000) >> 24)
|
||
g = Double((hexNumber & 0x00ff0000) >> 16)
|
||
b = Double((hexNumber & 0x0000ff00) >> 8)
|
||
a = Double(hexNumber & 0x000000ff)
|
||
}
|
||
self.init(.sRGB, red: r / 255, green: g / 255, blue: b / 255, opacity: a / 255)
|
||
}
|
||
}
|
||
</code></pre>
|
||
<h2 id="swiftui-modifiers"><a class="header" href="#swiftui-modifiers">SwiftUI Modifiers</a></h2>
|
||
<pre><code class="language-swift">import SwiftUI
|
||
/// This modifier wraps a view into a `GeometryReader` and tracks the available space.
|
||
///
|
||
/// @State var size: CGSize = .zero
|
||
///
|
||
/// myView.modifier(SizeViewModifier(size: $size))
|
||
///
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
public struct SizeViewModifier: ViewModifier {
|
||
@Binding private(set) var size: CGSize
|
||
/// Create a size view modifier from a CGSize binding
|
||
///
|
||
/// myView.modifier(SizeViewModifier(size: $size))
|
||
///
|
||
/// - Parameters:
|
||
/// - size: CGSize binding
|
||
/// - Returns: A new modifier
|
||
public init(size: Binding<CGSize>) {
|
||
self._size = size
|
||
}
|
||
public func body(content: Content) -> some View {
|
||
GeometryReader { proxy in
|
||
content
|
||
.frame(size: proxy.size)
|
||
.onReload(perform: {
|
||
self.size = proxy.size
|
||
})
|
||
}
|
||
}
|
||
}
|
||
</code></pre>
|
||
<h2 id="swiftui-utils-functions"><a class="header" href="#swiftui-utils-functions">swiftUI Utils functions</a></h2>
|
||
<pre><code class="language-swift">import SwiftUI
|
||
/// It is an utility that adds back a way to use the if let.
|
||
///
|
||
/// ifLet(myImage, then: {
|
||
/// $0.resizable()
|
||
/// })
|
||
///
|
||
/// - Parameters:
|
||
/// - value: optional value to verify
|
||
/// - then: callback to create a view with the value is not nil
|
||
/// - Returns: The built view
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
@inlinable public func ifLet<T, ThenOut: View>(_ value: T?, then: (T) -> ThenOut) -> some View {
|
||
ViewBuilder.buildIf(value.map { then($0) })
|
||
}
|
||
/// It is an utility that adds back a way to use the if let with an else option
|
||
///
|
||
/// ifLet(myImage, then: {
|
||
/// $0.resizable()
|
||
/// }, else: {
|
||
/// Text("Hello")
|
||
/// })
|
||
///
|
||
/// - Parameters:
|
||
/// - value: optional value to verify
|
||
/// - then: callback to create a view with the value is not nil
|
||
/// - else: callback to create a view with the value is nil
|
||
/// - Returns: The built view
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
@inlinable public func ifLet<T, ThenOut: View, ElseOut: View>(
|
||
_ value: T?,
|
||
then: (T) -> ThenOut,
|
||
`else`: () -> ElseOut) -> some View {
|
||
value.map { ViewBuilder.buildEither(first: then($0)) } ??
|
||
ViewBuilder.buildEither(second: `else`())
|
||
}
|
||
/// It is an utility that adds back a way to use the if let for collections checking if it is empty.
|
||
///
|
||
/// ifLet(myText, empty: false, then: {
|
||
/// Text($0)
|
||
/// })
|
||
///
|
||
/// - Parameters:
|
||
/// - value: optional value to verify
|
||
/// - empty: condition to check if string is valid when is empty.
|
||
/// - then: callback to create a view with the value is not nil
|
||
/// - Returns: The built view
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
@inlinable public func ifLet<T, ThenOut: View>(
|
||
_ value: T?,
|
||
empty: Bool = false,
|
||
then: (T) -> ThenOut
|
||
) -> some View where T : Collection {
|
||
let value = !empty && value.isNilOrEmpty ? nil : value
|
||
return ViewBuilder.buildIf(value.map { then($0) })
|
||
}
|
||
/// It is an utility that adds back a way to use the if let with an else option
|
||
///
|
||
/// ifLet(myText, empty: false, then: {
|
||
/// $0
|
||
/// }, else: {
|
||
/// Text("Hello")
|
||
/// })
|
||
///
|
||
/// - Parameters:
|
||
/// - value: optional value to verify
|
||
/// - empty: condition to check if string is valid when is empty.
|
||
/// - then: callback to create a view with the value is not nil
|
||
/// - else: callback to create a view with the value is nil
|
||
/// - Returns: The built view
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
@inlinable public func ifLet<T, ThenOut: View, ElseOut: View>(
|
||
_ value: T?,
|
||
empty: Bool = false,
|
||
then: (T) -> ThenOut,
|
||
`else`: () -> ElseOut
|
||
) -> some View where T : Collection {
|
||
let value = !empty && value.isNilOrEmpty ? nil : value
|
||
return value.map { ViewBuilder.buildEither(first: then($0)) } ??
|
||
ViewBuilder.buildEither(second: `else`())
|
||
}
|
||
</code></pre>
|
||
<h2 id="for-swiftui-userdefault"><a class="header" href="#for-swiftui-userdefault">for SwiftUI UserDefault</a></h2>
|
||
<pre><code class="language-swift">import Foundation
|
||
/// A type that adds an interface to use the user’s defaults with default types
|
||
///
|
||
/// Example:
|
||
/// ```
|
||
/// @UserDefault(key: "nameKey", defaultValue: "Root") var name: String
|
||
/// ```
|
||
/// Adding the attribute @UserDefault the property works reading and writing from user's defaults
|
||
///
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
@propertyWrapper public struct UserDefault<T> {
|
||
private let key: String
|
||
private let defaultValue: T
|
||
/// Initialize the key and the default value.
|
||
public init(key: String, defaultValue: T) {
|
||
self.key = key
|
||
self.defaultValue = defaultValue
|
||
}
|
||
public var wrappedValue: T {
|
||
get {
|
||
return UserDefaults.standard.object(forKey: key) as? T ?? defaultValue
|
||
}
|
||
set {
|
||
UserDefaults.standard.set(newValue, forKey: key)
|
||
}
|
||
}
|
||
}
|
||
</code></pre>
|
||
<h2 id="for-swiftui-userdefaultenum"><a class="header" href="#for-swiftui-userdefaultenum">for SwiftUI UserDefaultEnum</a></h2>
|
||
<pre><code class="language-swift">import Foundation
|
||
/// A type that adds an interface to use the user’s defaults with raw representable types where the raw value is of type string
|
||
///
|
||
/// Example:
|
||
/// ```
|
||
/// enum Beverage: String, CaseIterable {
|
||
/// case coffee, tea, juice
|
||
/// }
|
||
///
|
||
/// @UserDefaultEnum(key: "beverageKey", defaultValue: .coffee) var beverage: Beverage
|
||
/// ```
|
||
/// Adding the attribute @UserDefaultEnum the property works reading and writing from user's defaults
|
||
///
|
||
@available(iOS 13.0, OSX 10.15, tvOS 13.0, watchOS 6.0, *)
|
||
@propertyWrapper public struct UserDefaultEnum<T: RawRepresentable> where T.RawValue == String {
|
||
private let key: String
|
||
private let defaultValue: T
|
||
/// Initialize the key and the default value.
|
||
public init(key: String, defaultValue: T) {
|
||
self.key = key
|
||
self.defaultValue = defaultValue
|
||
}
|
||
public var wrappedValue: T {
|
||
get {
|
||
if let string = UserDefaults.standard.string(forKey: key) {
|
||
return T(rawValue: string) ?? defaultValue
|
||
}
|
||
return defaultValue
|
||
}
|
||
set {
|
||
UserDefaults.standard.set(newValue.rawValue, forKey: key)
|
||
}
|
||
}
|
||
}
|
||
</code></pre>
|
||
|
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