How do I replace the existing action of a(n?) UIButton?

Question

So far, I've been using

[button1 addTarget:self action:@selector(newAction) forControlEvents:UIControlEventTouchUpInside];

which adds an additional action (I think). How can I replace the initial action with a new one?

Answer 1

Hello pureman,

First, you'll need a reference to your button1. Then you need to unregister the target by calling following action:

[button1 removeTarget:self action:@selector(oldAction) forControlEvents:UIControlEventTouchUpInside]

You may pass nil as action, this will remove all actions from connected with that target from button.

Then, you need to call

[button1 addTarget:self action:@selector(newAction) forControlEvents: UIControlEventTouchUpInside];

That's pretty it!

Hope this was helpful, Pawel

Answer 2

You first have to remove the current action with removeTarget:action:forControlEvents: and then add the new one with addTarget:action:forControlEvents:.