UIHostingController和navigationController

Question

默认的navigationController中嵌入视图控制器并推送到下一个UIHostingController的快捷项目。

如何从navigationController?.popViewController调用SimpleView？

ViewController：

@IBOutlet weak var button: UIButton?

override func viewDidLoad() {
    super.viewDidLoad()
    button?.addTarget(self,
                      action: #selector(showNewSwiftUIController),
                      for: .touchUpInside)
}

@objc func showNewSwiftUIController() {
    let vc = UIHostingController(rootView:SimpleView())
    navigationController?.pushViewController(vc, animated: true)
}

SwiftUI：

struct SimpleView: View {
    var body: some View {
        Text("SimpleView")
            .foregroundColor(.black)
    }
}

Answer 1

第一。你试过吗？

@Environment(\.presentationMode) var presentationMode: Binding<PresentationMode> // reference

然后在你的身体呼叫：

self.presentationMode.wrappedValue.dismiss()

如果这样做不起作用：

我建议您将导航控制器作为可选变量传递到View中，作为引用并从那里进行访问。其他选项(也许是更健康的选项)是将一个“回调”变量从父变量传递给childView，以关闭视图(您需要将导航保存为一个变量来跟踪)

最后一种选择(不建议)

if var topController = UIApplication.shared.windows.first?.rootViewController {
        
        while let presentedViewController = topController.presentedViewController {
            topController = presentedViewController
        }
        topController.navigationController.popViewController(animated:true)

 }