禁用 NavigationLink SwiftUI 的向后滑动

Question

如何在 SwiftUI 中禁用向后滑动手势？子视图只能使用后退按钮关闭。

Answer 1

通过隐藏导航栏中的后退按钮，可以禁用向后滑动手势。您可以设置自定义后退按钮.navigationBarItems()

struct ContentView: View {
    var body: some View {
        NavigationView{
            List{
                NavigationLink(destination: Text("You can swipe back")){
                    Text("Child 1")
                }
                NavigationLink(destination: ChildView()){
                    Text("Child 2")
                }
            }
        }
    }
}

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

    var body:some View{
        Text("You cannot swipe back")
            .navigationBarBackButtonHidden(true)
            .navigationBarItems(leading: Button("Back"){self.presentationMode.wrappedValue.dismiss()})
    }
}

Answer 2

添加此扩展对我有用（禁用在任何地方向后滑动，以及禁用手势识别器的另一种方法）：

extension UINavigationController: UIGestureRecognizerDelegate {
    override open func viewDidLoad() {
        super.viewDidLoad()
        interactivePopGestureRecognizer?.delegate = self
    }
    
    public func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool { 
        return false
    }
}