Question

I am just starting with OSX development, and I am trying to get delegate notifications from a NSTextField. I’ve got the following code so far:

This is where I set the delegate:

- (void) awakeFromNib {
    NSLog(@"Setting delegate");
    [amountField setDelegate: [[TextfieldController alloc] initWithLog]];
}

And this is my TextfieldController:

- (TextfieldController *) initWithLog {
    self = [super init];
    NSLog(@"TextfieldController initialized");
    return self;
}

- (void)textDidChange:(NSNotification *)aNotification {
    NSLog(@"textdidChange");
}


- (void)keyUp:(NSNotification *)aNotification {
    NSLog(@"keyUp");
}

However, neither textDidChange nor keyUp is ever called… Not sure what I’m missing here, because the same way works just fine when I use it for my main window with the windowDidMiniaturize notification…

Anyone able to help? 🙂

Answer 1

The delegate should implement -controlTextDidChange:, not -textDidChange:. The -textDidChange: method is a method on NSTextField which causes it to post a notification and call [self.delegate controlTextDidChange:]. As for -keyUp:, that’s part of NSControl‘s event-handling behaviour. If you want your delegate to receive a message when the textfield handles a key up event, you’ll need to arrange that yourself by subclassing NSTextField.