在下面的示例中，文本及其ID在按下按钮时会更改文本视图。因此，由于更新的ID，Swiftui应该将文本视图视为新视图，应该吗？那为什么...

Question

Text

视图视为新视图，应该吗？那么为什么过渡不触发呢？

结构TextTransitionView：查看{
@State Private var text：string =“你好，世界！”

private var textTransition: AnyTransition {
    .asymmetric(
        insertion: .move(edge: .bottom).combined(with: .opacity),
        removal: .move(edge: .top).combined(with: .opacity)
    )
}

var body: some View {
    Text(text)
        .transition(textTransition)
        .id(text)
    
    Button("Change Text") {
        self.text += "!"
    }
}

}

为每个周期都有新的景观：

struct TextTransitionView: View {
    @State private var text: String = "Hello, World!"
    
    private var textTransition: AnyTransition {
        .asymmetric(
            insertion: .move(edge: .bottom).combined(with: .opacity),
            removal: .move(edge: .top).combined(with: .opacity)
        )
    }
    
    var body: some View {
        VStack {
            Text(text)
                .transition(textTransition)
                .id(text)  // Ensures the Text view has a new identity

            Button("Change Text") {
                withAnimation {
                    self.text += "!"
                }
            }
        }
    }
}

Answer 1