Objective-C, changing NSButton functionality?

Question

How can I change the functionality of a button that I used previously? For example, If I had a button that did "Proceed/Cancel" and let's say you "Proceed" the button would change to something such as "View/Go Back"? Basically I want to re-use the same button for something else, but since I don't know how maybe someone can help me understand it better. Thank you.

- (IBAction)someButton:(NSButton *)sender {

       if ([someString isEqualToString:someThing]) {
            isAllowed = YES;
            [oneButton setTitle:@"Proceed"];
            [self continue];
        }
        else {
            [oneButton setTitle:@"Cancel"];
            return;
            }
        }

- (void)continue {

// I would like to make someButton (above) take on different functionality 
// here if that's even possible. such as:

  [oneButton setTitle:@"View"];
  [self whatNow];

Answer 1

At some point in your program lifecycle you could replace the previous target and/or action of a NSButton by the desired one.

[oneButton setAction:@selector(continue)];

This will cause your continue selector to be called instead of the someButton: for the oneButton instance.

OBS: just pay attention at your selectors as the one from the NIB file has a parameter @selector(someButton:) and the one you are creating does not have any, so it stays as @selector(continue)

as seen here: Cocoa forControlEvents:WHATGOESHERE