Question

SwiftUI的.sheet行为异常，我无法解决。这是一个使用相同模态的简单“主控>细节视图”。 NavigationView中一个在.navigationBarItems中另一个：

struct MasterView: View {
    @State var showModal: Bool = false
    var modal: some View {
        ModalView(showModal: $showModal)
    }
    var body: some View {
        NavigationView {
            VStack {
                Button("Can be dismissed") { self.showModal = true }.sheet(isPresented: $showModal) { self.modal }
                NavigationLink(destination: DetailView()) { Text("Can't be dismissed") }
            }
        }
    }
}

struct DetailView: View {
    @State var showModal: Bool = false
    var modal: some View {
        ModalView(showModal: $showModal)
    }
    var body: some View {
        Text("Detail View")
            .navigationBarItems(trailing: Button("Dismisss?") { self.showModal = true }.sheet(isPresented: $showModal) { self.modal })
    }
}

struct ModalView: View {
    @Binding var showModal: Bool
    var body: some View {
        VStack {
            Text("Modal View")
            Button("Dismiss") { self.showModal = false }
        }
    }
}

问题在于，尽管ModalView可以从Button的{{1}}中解雇，但不能与MasterView的{{1}}一起被解雇

任何人都知道如何消除从.navigationBarItems调用的DetailView吗？

编辑：有趣的是，如果您切换

.sheet

使用

.navigationBarItems

您将获得非常意外的结果，除非禁用该模式，否则Text("Detail View")将被禁用

编辑2：现在，此行为已记录为ID为FB6891155的错误

Answer 1

这绝对值得一个错误报告。最初，我认为使用@Environment(\.presentationMode)可以解决此问题，但绝对不能改变行为。

我的发现是，如果只有1 sheet，则可以使模态被忽略。即如果您从sheet中删除了DetailView通话。

struct MasterView: View {
    @State var showModal: Bool = false

    var modal: some View {
        ModalView()
    }
    var body: some View {
        NavigationView {
            VStack {
                Button("Can be dismissed") { self.showModal = true }.sheet(isPresented: $showModal) { self.modal }
                NavigationLink(destination: DetailView(showModal: $showModal)) { Text("Can't be dismissed") }
            }
        }
    }
}

struct DetailView: View {
    @Binding var showModal: Bool

    var body: some View {
        Text("Detail View")
            .navigationBarItems(trailing: Button("Dismisss?") { self.showModal = true })
    }
}

struct ModalView: View {
    @Environment(\.presentationMode) var showModal

    var body: some View {
        VStack {
            Text("Modal View")
            Button("Dismiss") {
                self.showModal.value.dismiss()
            }
        }
    }
}

虽然这确实使模态在程序上无法使用，但您最终还是遇到了您所提到的第二个错误，即禁用.navigationBarItems直到返回SwiftUI button in navigation bar only works once

导航按钮无法取消模态

1 个答案: