Custom UIButton class, is there a was clicked event?

Question

I'm trying to make a custom UIButton class called BubbleButton. It will perform some animations when the button is clicked and released. Are there methods that I can put in that will be called when the button is pressed or released? Such as didClicked or something like that?

Answer 1

There are only (really) two that you should be worried about, setSelected and setHighlighted . setHighlighted is called immediatly after the button is pressed and setSelected is called if you hold the button for like 1/2 a second. There is also a focused state but thats not really relevant. Here is an example of a UIButton I subclasssed:

-(void)drawRect:(CGRect)rect{ 
  [super drawRect:rect]; 
  //Set unhighlighted state 
  if (self.highlighted) { 
     //Set highlighted state 
 } 
} 
-(void)setHighlighted:(BOOL)highlighted { 
  [super setHighlighted:highlighted]; 
  [self setNeedsDisplay]; 
}