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iPhone animation puzzle
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iPhone animation puzzle


  • Subject: iPhone animation puzzle
  • From: David Rowland <email@hidden>
  • Date: Sat, 19 Mar 2011 14:42:53 -0700

This works. It fades the label to invisibility.

  label.alpha = 1.0;
  [UIView beginAnimations:nil context:nil];
  [UIView setAnimationDuration:2.5];
  label.alpha = 0;
  [UIView commitAnimations];


and so does this,

  label.alpha = 1.0;
  [UIView animateWithDuration:2.5 animations:^{label.alpha = 0.0;} ];


The documentation says the latter is now preferred and does the same thing as the former. In particular, both will
start a separate thread for the animation.

My problem is that the second method seems to block the main thread. While it is acting I cannot use any of the controls on the screen. The first method lets me do what I wish as it proceeds.


Anyone have advice?

thanks,

David

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