Question

I have a button, and set image for it. How I can remove that image later if I need?
This peace of code does’t works for me:

[sender setImage:nil forState:UIControlStateNormal];

Answer 1

sender needs to be your UIButton.

The only place sender might be valid is if it’s in an IBAction called by your button, e.g.:

- (IBAction) buttonPressed: (id) sender
{
   [sender setImage: nil forState: UIControlStateNormal];
}

But outside of that, you probably need to connect your button to an IBOutlet and then you can set the image to nil whenever you wish.