从 SwiftUIView 中导航到 UIViewController

Question

I have a UIKit app where I have a SwiftUIView hosted in a UIHostingController , in this SwiftUIView I have a Button which I would like to use to navigate to another UIViewController when tapped.

How can I navigate to a UIViewController from inside a SwiftUIView?

struct SwiftUIView: View {
    var body: some View {
        Button(action: {
            // on tap, go to MyViewController
        }) {
            Text("Go to UIViewController")
        }
    }
}

Thanks

EDIT: Showing Code for Kyokook Hwang (Option One).

My ViewController

class MyViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        let myLabel = UILabel(frame: CGRect(x: 100, y: 100, width: 200, height: 21))
        myLabel.text = "My Label"
        view.addSubview(myLabel)
    }
}

Struct File:

import SwiftUI

struct MyView: UIViewControllerRepresentable {
    func makeUIViewController(context: UIViewControllerRepresentableContext<MyView>) -> MyViewController {
        let vc = MyViewController()
        return vc
    }
    func updateUIViewController(_ uiViewController: MyViewController, context: UIViewControllerRepresentableContext<MyView>) {
    }
}

SwiftUI Code:

struct SomeView: View {
    @State var isShowingMyVC = false
    var body: some View {
        VStack{
            Button(action: {
                self.isShowingMyVC = true
            }) {
                Text("Go to UIViewController")
                .sheet(isPresented: $isShowingMyVC) {
                    MyView()
                }
            }
        }
    }
}

Answer 1

As far as I know, there are two way to achieve what you want to do.

1. Use UIViewControllerRepresentable .

1) Create a bridge view with the protocol which embraces a UIViewController what you want to present.
2) Use .sheet operator to present the bridge view when the button is touched.

There is an example below.

struct MyView: UIViewControllerRepresentable {

    func makeUIViewController(context: UIViewControllerRepresentableContext<MyView>) -> MyViewController {
        let vc = MyViewController()
        return vc
    }

    func updateUIViewController(_ uiViewController: MyViewController, context: UIViewControllerRepresentableContext<MyView>) {

    }
}

struct SwiftUIView: View {
    @State var isShowingMyVC = false
    var body: some View {
        Button(action: {
            // on tap, go to MyViewController
            self.isShowingMyVC = true
        }) {
            Text("Go to UIViewController")
        }
        .sheet(isPresented: $isShowingMyVC) {
            MyView()
        }
    }
}

2. Use a button action handler.

If you don't want SwiftUIView to know any UIViewController that it should interact with, make SwiftUIView have an action handler which is called by the button. and then, use it somewhere in UIKit code in order to present any UIViewController.

struct SwiftUIView: View {
    @State var isShowingMyVC = false
    var tapHandler: (() -> Void)? = nil

    var body: some View {
        Button(action: {
            // on tap, go to MyViewController
            self.tapHandler?()
        }) {
            Text("Go to UIViewController")
        }
        .sheet(isPresented: $isShowingMyVC) {
            MyView()
        }
    }
}

let hostingView = UIHostingController(rootView: SwiftUIView() {
    self.present(MyViewController(), animated: true, completion: nil)
})
hostingView.view.frame = view.bounds
view.addSubview(hostingView.view)

I'm not sure of those two ways are exactly what you are looking for. Just hope it's useful to you.