Ios SwiftUI 选项卡式视图防止滑动到下一个选项卡

我试图阻止滑动到第二个选项卡，直到用户单击第一个选项卡视图上的按钮，指示数据已完成.然后用户可以刷卡.我认为它在第一个选项卡视图中是@State，因为它是真理的来源，在主内容视图中是@Binding，但这不起作用.我已经简化了代码并删除了绑定信息，这样至少可以构建它.任何 idea 或更好的方法都值得赞赏.(这方面很新……)

//ContentView.swift file

struct ContentView: View {
    
    @State private var selection = 0
    @State var allowSwipeTo2 = false

    var body: some View {
        VStack {
            Text("Main Content View")
            Text(String(allowSwipeTo2)) //added this line, and can see it change from false to true when button is clicked, but still not swipable

                .font(.system(size: 18))
        }
        
        TabView(selection: $selection){
            tab1View(allowSwipeTo2: $allowSwipeTo2) //modified based on recommendation
                .tag(0)
    
            if allowSwipeTo2 == true {
                tab2View()
                    .tag(1)
            }
            }.tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
    }
}

//tab1View.swift file with the button and the booleans for disabling further changes and ok to swipe:

struct tab1View: View {
    @State private var p8_10 = 0
    @State private var stepperDisabled = false
    @Binding var allowSwipeTo2: Bool  //modified based on recommendation
    @State private var showingAlert = false

    var body: some View {

        VStack{
            HStack{
                Text("Things")
                Stepper("Total: \(p8_10)", value: $p8_10, in: 0...15)
            }.font(.system(size: 15))
                .disabled(stepperDisabled)
            
            HStack{
                Spacer()
                
                Button("Entry Complete") {
                    showingAlert = true
                    
                }.alert(isPresented: $showingAlert){
                    Alert(
                        title: Text("Entry Complete?"),
                        message: Text("You will no longer be able to change your entry"),
                        primaryButton: .cancel(),
                        secondaryButton: .destructive(
                            Text("OK"),
                            action:{
                                stepperDisabled = true
                                allowSwipeTo2 = true
                            })
                    )
                }
                Spacer()
            }
        }
    }
}

//tab2View.swift file

struct tab2View: View {
    var body: some View {
        Text("Tab 2 Content!")
            .font(.system(size: 15))
    }
}```