SwiftUI で画面遷移先の View から遷移元のメソッドを呼び出す
SwiftUI で画面遷移先の View から遷移元のメソッドを呼び出すサンプルです。 delegate を使ったのですが、Combine で書いた方がよいかもしれません。
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import SwiftUI | |
| struct ContentView: View, MyProtocol { | |
| @State var text: String = "My Text" | |
| var body: some View { | |
| NavigationView { | |
| VStack { | |
| Text(text) | |
| NavigationLink(destination: SecondView(delegate: self)) { | |
| Text("2nd View") | |
| } | |
| } | |
| } | |
| } | |
| func myFunc() { | |
| text = "Changed Text" | |
| } | |
| } | |
| protocol MyProtocol { | |
| func myFunc() | |
| } | |
| struct SecondView: View { | |
| var delegate: MyProtocol | |
| var body: some View { | |
| Button(action: { | |
| self.delegate.myFunc() | |
| }) { | |
| Text("ChangeText") | |
| } | |
| } | |
| } | |
| struct ContentView_Previews: PreviewProvider { | |
| static var previews: some View { | |
| ContentView() | |
| } | |
| } |