How can I remove a shadow in iPhone

Question

I am using the standard way of making shadows from a button programmatically, but I would like to shadow to no longer exist after I am done with the button. I could set opacity

Answer 1

I would just remove the button, and replace it with an identical (but non-shadowed) button. Or keep both around and hide/unhide one of them. Sometimes it's easier to create a new UI object than munge around with an existing one.

Answer 2

I usually do the following to be safe.

  [[tempButton layer] setShadowOpacity:0.0];
  [[tempButton layer] setShadowRadius:0.0];
  [[tempButton layer] setShadowColor:nil];

Quartz is highly optimized and will not waste any time rendering if it doesn't have to.