ios - 从 SwiftUI View 到 UIKit ViewController 的 SwiftUI 不一致行为 "pushing"

Question

我正在将一些 SwiftUI View 实现到现有的 UIKit 应用程序中。 DashboardView (下面)是一个主屏幕，然后我需要推送到现有的 UIKit ViewControllers .我正在尝试将 View Controller 推送到导航堆栈上(即使用后退按钮，而不是模态)。下面的代码，显示更多按钮下的推送按预期工作，推送到 SkateListViewController带有后退按钮，但是按下 WorkoutListView将 View Controller 呈现为模态？和WorkoutListView有关系吗？被嵌入到父 View 中？

struct DashboardView: View {
    var body: some View {
        ScrollView {
                VStack(spacing: 7.0) {
                    HStack {
                        Text("Workouts")
                            .font(.custom(futuraBold, size: largeTitleTextSize))
                            .padding(.leading)
                        Spacer()
                        
                        Button(action: {
                        
                            let storyBoard: UIStoryboard =  UIStoryboard(name: "Version3", bundle: nil)
                            let skateListTVC = storyBoard.instantiateViewController(withIdentifier: "skateListVC") as! SkateListTableViewController
                            UIApplication.topViewController()?.navigationController?.pushViewController(skateListTVC, animated: true) //This line works as expected and pushes onto Nav Stack with back button
                        }) {
                            Text("Show More")
                              .font(.custom(futuraMedium, size: headlineTextSize))
                                .foregroundColor(Color.blue)
                        }
                    }
                    ZStack {
                        VStack(alignment: .leading) {
                            WorkoutListView(workouts: [MockWorkout().getMockWorkout()])
                        }
                        .padding(.horizontal)
                    }
                }
               }
          }
    }    
}


struct WorkoutListView: View {
    
    @State var workouts: [HKWorkout]
    
    var body: some View {
        VStack(alignment: .leading) {
                ForEach(workouts) { workout in
                    WorkoutRow(workout: workout)
                        .onTapGesture {
                            SelectedWorkoutSingleton.sharedInstance.selectedWorkout = workout
                            let storyBoard: UIStoryboard =  UIStoryboard(name: "Version3", bundle: nil)
                                let skateDetailHostingControllerView = storyBoard.instantiateViewController(withIdentifier: "skateDetailHostingController") as! SkateDetailHostingController
                                 UIApplication.topViewController()?.navigationController?.pushViewController(skateDetailHostingControllerView, animated: true) //This line shows Hosting Controller as Modal, doesn't push
                           
                        }
                }
        }
    }
}

Answer 1

为什么不使用 NavigationLink 然后推送到您的 View 。首先，创建 UIViewControllerRepresentable ..

struct SkateDetailWrapper: UIViewControllerRepresentable {
    typealias UIViewControllerType = SkateDetailHostingController
    
    func makeUIViewController(context: Context) -> SkateDetailHostingController {
        let storyBoard: UIStoryboard =  UIStoryboard(name: "Version3", bundle: nil)
        let skateDetailHostingControllerView = storyBoard.instantiateViewController(withIdentifier: "skateDetailHostingController") as! SkateDetailHostingController
        return skateDetailHostingControllerView
    }
    
    func updateUIViewController(_ uiViewController: SkateDetailHostingController, context: Context) {
    }
}

然后用 NavigationLink 推送它:

ForEach(workouts, id:\.self) { workout in
    
    NavigationLink(destination: SkateDetailWrapper()) {
        WorkoutRow(workout: workout)
    }