The exception is "NSWindow: -_oldFirstResponderBeforeBecoming is not a valid message outside of a responder's implementation of -becomeFirstResponder." However, according to the stack trace the message is called from becomeFirstResponder
, so I don't know what I am doing wrong. This is an intermittent error.
The user presses a key command sequence, which fires a menu item, which sends a message to the key window controller, which tells a search field on the window to become first responder.
Here's a summarised stack trace::
[NSException raise:format:]
[NSWindow _oldFirstResponderBeforeBecoming]
[NSSearchField becomeFirstResponder]
[MyWindowController focusSearchField]
[NSApplication sendAction:to:from:]
[NSMenu performKeyEquivalent:]
The implementation of the window controller's action is very simple:
public var searchField: NSSearchField?
@IBAction public func focusSearchField(sender: AnyObject) {
searchField?.becomeFirstResponder()
}
Thanks for any assistance.
I found a solution here.
Instead of using
becomeFirstResponder
, you should useNSWindow
'smakeFirstResponder
method.