Return from Hosting Controller to another controller from storyboard - swift

Question

I have a project with Storyboard but now I'm migrating to SwiftUI.
I have a Hosting Controller that control del SwiftUI segment, but now I need to return from this to another controller from Storyboard.
Basically I can do this: Storyboard (Controller 1) -> HostingController (SwiftUI).
So now y I need to return: HostingController (SwiftUI) -> Storyboard (Controller 2).

Answer 1

I like to use closures for this. I assume you are presenting the hosting controller like this?
let viewController = UIHostingController(rootView: ContentView())
self.present(viewController, animated: true)
You can add a closure dismissSelf, inside your SwiftUI View struct:
struct ContentView: View {
var dismissSelf: (() -> Void)?
var body: some View {
Button(action: {
dismissSelf?()
}) {
Text("Return")
}
}
}
This will call dismissSelf when the button is pressed. Now, you need to assign dismissSelf to a block of code that dismisses the UIHostingController. You can do it like this:
class ViewController: UIViewController {
#objc func buttonPressed() {
var viewController: UIViewController?
let contentView = ContentView {
/// set the closure (it's a trailing closure, so you don't need to put the `dismissSelf`)
viewController?.dismiss(animated: true, completion: nil)
}
viewController = UIHostingController(rootView: contentView)
if let vc = viewController {
self.present(vc, animated: true, completion: nil)
}
}
/// make the button
override func viewDidLoad() {
super.viewDidLoad()
let button = UIButton(frame: CGRect(x: 50, y: 50, width: 80, height: 40))
button.setTitle("Present", for: .normal)
button.setTitleColor(.blue, for: .normal)
button.addTarget(self, action: #selector(buttonPressed), for: .touchUpInside)
view.addSubview(button)
}
}
There's one thing that's kind of oof about this. viewController will never be nil, but to avoid a force unwrap I put in an if let.
Result: