106 lines
2.5 KiB
Swift
106 lines
2.5 KiB
Swift
import SwiftUI
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import SwiftUINavigation
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struct OptionalFullScreenCovers: View {
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@ObservedObject private var model = FeatureModel()
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var body: some View {
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List {
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Section {
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Stepper("Number: \(self.model.count)", value: self.$model.count)
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HStack {
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Button("Get number fact") {
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self.model.numberFactButtonTapped()
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}
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if self.model.isLoading {
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Spacer()
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ProgressView()
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}
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}
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} header: {
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Text("Fact Finder")
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}
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Section {
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ForEach(self.model.savedFacts) { fact in
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Text(fact.description)
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}
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.onDelete { self.model.removeSavedFacts(atOffsets: $0) }
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} header: {
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Text("Saved Facts")
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}
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}
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.fullScreenCover(unwrapping: self.$model.fact) { $fact in
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NavigationView {
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FactEditor(fact: $fact.description)
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.disabled(self.model.isLoading)
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.foregroundColor(self.model.isLoading ? .gray : nil)
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.toolbar {
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ToolbarItem(placement: .cancellationAction) {
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Button("Cancel") {
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self.model.cancelButtonTapped()
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}
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}
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ToolbarItem(placement: .confirmationAction) {
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Button("Save") {
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self.model.saveButtonTapped(fact: fact)
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}
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}
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}
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}
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}
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.navigationTitle("Full-screen covers")
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}
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}
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private struct FactEditor: View {
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@Binding var fact: String
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var body: some View {
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VStack {
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TextEditor(text: self.$fact)
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}
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.padding()
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.navigationTitle("Fact editor")
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}
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}
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@MainActor
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private class FeatureModel: ObservableObject {
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@Published var count = 0
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@Published var fact: Fact?
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@Published var isLoading = false
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@Published var savedFacts: [Fact] = []
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private var task: Task<Void, Error>?
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func numberFactButtonTapped() {
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self.isLoading = true
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self.fact = Fact(description: "\(self.count) is still loading...", number: self.count)
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self.task = Task {
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let fact = await getNumberFact(self.count)
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self.isLoading = false
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try Task.checkCancellation()
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self.fact = fact
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}
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}
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func cancelButtonTapped() {
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self.task?.cancel()
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self.task = nil
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self.fact = nil
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}
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func saveButtonTapped(fact: Fact) {
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self.task?.cancel()
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self.task = nil
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self.savedFacts.append(fact)
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self.fact = nil
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}
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func removeSavedFacts(atOffsets offsets: IndexSet) {
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self.savedFacts.remove(atOffsets: offsets)
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}
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}
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