如何处理 UIViewControllerRepresentable 包装器内的 NavigationLink？

Question

所以我正在尝试创建一个自定义分页滚动视图。我已经能够创建该包装器，并且该包装器中的内容由一个自定义视图组成。在那个自定义视图中，我有两个 NavigationLink 按钮，按下后应该会将用户带到两个不同的视图。

那些 NavigationLink 按钮不起作用。

该scrollViewWrapper是NavigationView内。我创建了一个测试按钮，它只是一个简单的 Button 并且似乎有效。因此，我在使用 NavigationLink 和 custom 时没有正确执行某些操作UIViewControllerRepresentable。

这是我使用自定义包装器的地方。

NavigationView {
            UIScrollViewWrapper {
                HStack(spacing: 0) {
                    ForEach(self.onboardingDataArray, id: \.id) { item in
                          OnboardingView(onboardingData: item)
                                .frame(width: geometry.size.width, height: geometry.size.height)
                       }
                    }
            }.frame(width: geometry.size.width, height: geometry.size.height)
             .background(Color.blue)
           }

入职视图：

struct OnboardingView: View {
var onboardingData: OnboardingModel

var body: some View {
    GeometryReader { geometry in
        VStack(spacing: 10) {
            Spacer()
            Image("\(self.onboardingData.image)")
                .resizable()
                .frame(width: 300, height: 300)
                .aspectRatio(contentMode: ContentMode.fit)
                .clipShape(Circle())
                .padding(20)

            Text("\(self.onboardingData.titleText)")
                .frame(width: geometry.size.width, height: 20, alignment: .center)
                .font(.title)

            Text("\(self.onboardingData.descriptionText)")
                .lineLimit(nil)
                .padding(.leading, 15)
                .padding(.trailing, 15)
                .font(.system(size: 16))
                .frame(width: geometry.size.width, height: 50, alignment: .center)
                .multilineTextAlignment(.center)
            Spacer(minLength: 20)
            if self.onboardingData.showButton ?? false {
                VStack {
                    Button(action: {
                        print("Test")
                    }) {
                        Text("Test Button")
                    }
                    NavigationLink(destination: LogInView()) {
                        Text("Login!")
                    }
                    NavigationLink(destination: SignUpView()) {
                        Text("Sign Up!")
                    }
                }
            }

            Spacer()
        }
    }
}
    }

自定义 ScrollView 包装器代码：

struct UIScrollViewWrapper<Content: View>: UIViewControllerRepresentable {
var content: () -> Content

init(@ViewBuilder content: @escaping () -> Content) {
    self.content = content
}

func makeUIViewController(context: Context) -> UIScrollViewController {
    let vc = UIScrollViewController()
    vc.hostingController.rootView = AnyView(self.content())
    return vc
}

func updateUIViewController(_ viewController: UIScrollViewController, context: Context) {
    viewController.hostingController.rootView = AnyView(self.content())
  }
}

class UIScrollViewController: UIViewController {

lazy var scrollView: UIScrollView = {
    let view = UIScrollView()
    view.isPagingEnabled = true
    return view
}()

var hostingController: UIHostingController<AnyView> = UIHostingController(rootView: AnyView(EmptyView()))

override func viewDidLoad() {
    super.viewDidLoad()

    self.view.addSubview(self.scrollView)
    self.pinEdges(of: self.scrollView, to: self.view)

    self.hostingController.willMove(toParent: self)
    self.scrollView.addSubview(self.hostingController.view)
    self.pinEdges(of: self.hostingController.view, to: self.scrollView)
    self.hostingController.didMove(toParent: self)
}

func pinEdges(of viewA: UIView, to viewB: UIView) {
      viewA.translatesAutoresizingMaskIntoConstraints = false
      viewB.addConstraints([
          viewA.leadingAnchor.constraint(equalTo: viewB.leadingAnchor),
          viewA.trailingAnchor.constraint(equalTo: viewB.trailingAnchor),
          viewA.topAnchor.constraint(equalTo: viewB.topAnchor),
          viewA.bottomAnchor.constraint(equalTo: viewB.bottomAnchor),
      ])
  }

Answer 1

您是否设置了触发转场？如果您使用的是 Xcode，您可以右键单击在主情节提要中创建的按钮。如果未设置，您可以转到右上角侧边栏的连接检查器，您可以在其中找到文件检查器、身份检查器、属性检查器...并指定您希望按钮执行的操作。