Detecting arrow/enter keys when editing NSTextField

Question

I couldn't find anything up to date that solve this issue. How can I monitor something like arrow key presses while editing an NSTextField?

From what I looked up: - NSControlTextEditingDelegate functions are not called (and I wouldn't know how to use them) - NSTextFieldDelegate functions don't list something that would work here

Answer 1

Set your text field's delegate:

textField.delegate = self

Add the following inheritance for protocols:

class MyTextField : NSTextFieldDelegate, NSControlTextEditingDelegate { ...

And implement the following:

   func control(_ control: NSControl, textView: NSTextView, doCommandBy commandSelector: Selector) -> Bool {
    if commandSelector == #selector(moveUp(_:)) {
        ...
    } else if commandSelector == #selector(moveDown(_:)) {
        ...
    } else if commandSelector == #selector(insertNewline(_:)) {
        ...
    }
    return true
}

There are more in depth explanations in this link Recognize if user has pressed arrow key while editing NSTextField swift