swiftui - 如何从 NavigationLink 中关闭工作表

Question

在下面的示例中，我有一个显示一张ViewOne. ViewOne有一个NavigationLink到ViewTwo。

我怎样才能解除工作表ViewTwo？

使用presentationMode.wrappedValue.dismiss()导航回ViewOne.

struct ContentView: View {

    @State private var isShowingSheet = false

    var body: some View {
        Button("Show sheet", action: {
            isShowingSheet.toggle()
        })
        .sheet(isPresented: $isShowingSheet, content: {
            ViewOne()
        })
    }
}

struct ViewOne: View {

    var body: some View {
        NavigationView {
            NavigationLink("Go to ViewTwo", destination: ViewTwo())
                .isDetailLink(false)
        }
    }
}

struct ViewTwo: View {

    @Environment(\.presentationMode) var presentationMode

    var body: some View {
        Button("Dismiss sheet here") {
            presentationMode.wrappedValue.dismiss()
        }
    }
}

Answer 1

这可能取决于平台——NavigationView例如，在 macOS 上，您现有的代码可以工作。

将 a 显式传递Binding给原始工作表状态应该可以工作：

struct ContentView: View {

    @State private var isShowingSheet = false

    var body: some View {
        Button("Show sheet", action: {
            isShowingSheet.toggle()
        })
        .sheet(isPresented: $isShowingSheet, content: {
            ViewOne(showParentSheet: $isShowingSheet)
        })
    }
}

struct ViewOne: View {
    @Binding var showParentSheet : Bool
    
    var body: some View {
        NavigationView {
            NavigationLink("Go to ViewTwo", destination: ViewTwo(showParentSheet: $showParentSheet))
                //.isDetailLink(false)
        }
    }
}

struct ViewTwo: View {
    @Binding var showParentSheet : Bool
    @Environment(\.presentationMode) var presentationMode

    var body: some View {
        Button("Dismiss sheet here") {
            showParentSheet = false
        }
    }
}