Ultimate Catalyst Guide

How do I support keyboard shortcuts?

Keyboard shortcuts are implemented via the existing UIKeyCommand system on UIResponder. Here's a simple example of how your currently visible view controller can listen for Escape key presses by the user:

class MyKeyListeningViewController: UIViewController {
    override var keyCommands: [UIKeyCommand]? {
        return [UIKeyCommand(input: UIKeyCommand.inputEscape,
                             modifierFlags: [],
                             action: #selector(doCancelCommand(sender:)))
        ]
    }
}

Keep in mind that on macOS multiple views can easily be visible at the same time and the rules of the responder chain apply.