如何导航出 ActionSheet？

Question

如何走出只能通过

ActionSheet

而不能通过

Text

的

NavigationLink

？

示例代码：

struct DemoActionSheetNavi: View {
    @State private var showingSheet = false

    var body: some View {
        NavigationView {

            Text("Test")

            .actionSheet(isPresented: $showingSheet) {
                ActionSheet(
                    title: Text("What do you want to do?"),
                    message: Text("There's only one choice..."),
                    buttons: [
                        .default(Text("How to navigate from here to HelpView???")),
                ])
            }


        }
    }
}

Answer 1

你需要这样的东西：

struct DemoActionSheetNavi: View {

    @State private var showingSheet = false
    @State private var showingHelp = false

    var body: some View {
        NavigationView {
            VStack {
                Text("Test")
                Button("Tap me") { self.showingSheet = true }
                NavigationLink(destination: HelpView(isShowing: $showingHelp),
                               isActive: $showingHelp) {
                    EmptyView()
                }
            }
            
        }
        .actionSheet(isPresented: $showingSheet) {
            ActionSheet(
                title: Text("What do you want to do?"),
                message: Text("There's only one choice..."),
                buttons: [.cancel(),
                          .default(Text("Go to help")) {
                            self.showingSheet = false
                            self.showingHelp = true
                    }])
        }
        
        
    }
}

您还有另一种状态，可以通过编程方式触发

NavigationLink

（您也可以使用

.sheet

和模态演示来实现）。您还需要将 ShowingHelp 作为

@Binding

传递以帮助视图能够重置它。

struct HelpView: View {
    
    @Binding var isShowing: Bool

    var body: some View {
        Text("Help view")
            .onDisappear() { self.isShowing = false }
        
    }
    
}