Question

我同时使用UIKit和swiftUI构建了一个应用。

在ios13.1上工作正常，但在ios 13.2上我有错误：

我正在 UIViewController 中显示一个 SwiftUI视图（使用 HostingController ）。此视图由 NavigationLink 中包装的元素组成。单击该元素时，尽管导航栏正常，但不会显示下一个视图；单击返回时，该应用程序将崩溃并显示为：

<Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Tried to pop to a view controller that doesn't exist.'>

这是与ios 13.2相关的错误吗？任何提示如何解决它？

这是我的代码：

UIController：

<类MyController：UIViewController {

var delegate: MenuItemsDelegate?

let vc = UIHostingController(rootView: MyView_UI())

override func viewDidLoad() {
    super.viewDidLoad()

    if #available(iOS 13.0, *) {
        view.backgroundColor = BACKGROUND_COLOR_D
    } else {
        view.backgroundColor = PALE_GREY
    }

    setupViews()
    setNavigationBar()
}

 func setupViews() {
    addChild(vc)
    view.addSubview(vc.view)
    vc.didMove(toParent: self)
    setupConstraints()
 }


 func setupConstraints() {
    vc.view.translatesAutoresizingMaskIntoConstraints = false

     [
        vc.view.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
          vc.view.centerXAnchor.constraint(equalTo: view.centerXAnchor),
          vc.view.widthAnchor.constraint(equalTo: view.widthAnchor),
        vc.view.bottomAnchor.constraint(equalTo: view.bottomAnchor),

         ].forEach {$0.isActive = true }

 }


func setNavigationBar() {
    title = ""
    navigationItem.leftBarButtonItem = UIBarButtonItem(image: #imageLiteral(resourceName: "slidingNotif").withRenderingMode(.alwaysOriginal),  style: .plain, target: self, action: #selector(handleMenuToggle))
    setNavigationRightBarButtons()
}

@objc func handleMenuToggle() {
    delegate?.handleMenuToggle(forMenuOption: nil)
}

}>

MyView_UI： < var body：一些视图{

    ScrollView{
        VStack(spacing: 15) {
            HStack(alignment: .center, spacing: 20) {
                NavigationLink(destination: SecondView_UI(some param )){
                    ThirdView_UI(some param), height: 150)
                }
                NavigationLink(destination: SecondView_UI(some param)){
                    ThirdView_UI(some, height: 150)
                }
            }
                .buttonStyle(PlainButtonStyle())
       //autres HStack(...)

   }
 }

}

>

MyView_UI和SecondView_UI正常显示，但是返回时应用崩溃

将ios13.1升级到13.2时出现的问题-NavigationLink-尝试弹出到不存在的视图控制器

0 个答案: