pressesBegan() in UIViewController connected to SwiftUI view

Question

Created Aug ’20

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I have a TypingController which when certain key are pressed will send out notifications. A SwiftUI view will receive those notifications and do something with them.

I am trying to figure out how to add this view controller to SceneDelegate.swift to maybe set this as the window.rootViewController but I am unable to work out how.

Any solutions to this would be appreciated.

Here's my code:

Code Block Swiftextension Notification.Name {
	static let enter = Notification.Name("enter")
	static let remove = Notification.Name("remove")
	static let submit = Notification.Name("submit")
}
class TypingController: UIViewController {
	override func pressesBegan(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
		guard let key = presses.first?.key else { return }
		switch key.keyCode {
			case .keyboardDeleteOrBackspace:
				NotificationCenter.default.post(name: .remove, object: nil)
			case .keyboardReturn:
				NotificationCenter.default.post(name: .submit, object: nil)
			default:
				guard let characters = key.characters else { return }
				if let number = Int(characters) {
					NotificationCenter.default.post(name: .enter, object: number)
				} else {
					super.pressesBegan(presses, with: event)
				}
		}
	}
}

Answered by BabyJ in 629439022

I have solved this now.

I added this method to the TypingController.

Code Block Swiftoverride func viewDidLoad() {
	super.viewDidLoad()
	
	let hostingController = UIHostingController(rootView: ContentView())
	view.addSubview(hostingController.view)
}

and changed the line in SceneDelegate.swift to window.rootViewController = TypingController().

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Answer 1

BabyJ OP

Aug ’20

Accepted Answer

I have solved this now.

I added this method to the TypingController.

Code Block Swiftoverride func viewDidLoad() {
	super.viewDidLoad()
	
	let hostingController = UIHostingController(rootView: ContentView())
	view.addSubview(hostingController.view)
}

and changed the line in SceneDelegate.swift to window.rootViewController = TypingController().

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