swiftui-example

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Cannot convert value of type 'String' to 'Binding<String>'

3

https://stackoverflow.com/a/59891334/1334703 ```swift TextField("placeholder", text: .constant("")) ``` ```swift struct SignInButtons_Previews: PreviewProvider { static var previews: some View { SignInButtons(backgroundColor: Color.blue, signInUrl: .constant("http://www.apple.com"), showModal: .constant(false)) } } ```

jaywcjlove

https://stackoverflow.com/a/63937440/1334703 ```swift struct ContainerView: View { let content: Content init(@ViewBuilder content: @escaping () -> Content) { self.content = content() } var body: some View { content } } ``` 这不仅允许您将简单的Views放入其中，而且由于使用@ViewBuilder，还可以使用if-else和switch-case块：...

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https://stackoverflow.com/a/33706783/1334703 ```swift enum Audience : String { case public case friends case private } let audience = Audience.public.rawValue // "public" ```

jaywcjlove

```swift struct Triangle: Shape { func path(in rect: CGRect)-> Path { var path = Path() path.move(to: CGPoint(x: rect.midX, y: rect.minY)) path.addLine(to: CGPoint(x: rect.minX, y: rect.maxY)) path.addLine(to: CGPoint(x: rect.maxX, y: rect.maxY))...

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```swift let entities = PersistenceController.shared.container.managedObjectModel.entities for entity in entities { if ((entity.name) != nil) { let deleteFetch = NSFetchRequest(entityName: entity.name!) let deleteRequest = NSBatchDeleteRequest(fetchRequest: deleteFetch) do { try viewContext.execute(deleteRequest) try...

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退出应用

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```swift Button(action: { // 退出应用 NSApplication.shared.terminate(self) }, label: { Image(systemName: "clock") Text("Click Me") }) ```

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