Question

I have a few UIButtons that I’d like to trigger short 5-10 frame animations when pressed in the middle of the screen along with other nonrelated stuffs. Can I just drop one UIImageView in IB and update it, somehow, programmatically? It doesn’t need to be overly complex, I don’t even mind if it’s hard coded, for now since it’s such a small project.

Thanks.

Answer 1

Here’s an example of the easiest way you do an animation with just a few frames is:

Declare an IBOutlet UIImageView *timerAnimation and link it to your UIIMageView in IB. Add some number of images to your resources, such as you see needed below. Then load the images into an array – see the code:

timerAnimation.animationImages = [NSArray arrayWithObjects:
      [UIImage imageNamed:@"timer00.png"],
      [UIImage imageNamed:@"timer01.png"],
      [UIImage imageNamed:@"timer02.png"],
      [UIImage imageNamed:@"timer03.png"],
      [UIImage imageNamed:@"timer04.png"],
      [UIImage imageNamed:@"timer05.png"],
      [UIImage imageNamed:@"timer06.png"],
      [UIImage imageNamed:@"timer07.png"],
      [UIImage imageNamed:@"timer08.png"],
      [UIImage imageNamed:@"timer09.png"],
      [UIImage imageNamed:@"timer10.png"],
      [UIImage imageNamed:@"timer11.png"],
      [UIImage imageNamed:@"timer12.png"],
      [UIImage imageNamed:@"timer13.png"],
      [UIImage imageNamed:@"timer14.png"],
      [UIImage imageNamed:@"timer15.png"],
      [UIImage imageNamed:@"timer16.png"],
      [UIImage imageNamed:@"timer17.png"],
      [UIImage imageNamed:@"timer18.png"],
      [UIImage imageNamed:@"timer19.png"],
      [UIImage imageNamed:@"timer20.png"],
      [UIImage imageNamed:@"timer21.png"],
      [UIImage imageNamed:@"timer22.png"],
      [UIImage imageNamed:@"timer23.png"],
      [UIImage imageNamed:@"timer24.png"],
      [UIImage imageNamed:@"timer25.png"],
      [UIImage imageNamed:@"timer26.png"],
      [UIImage imageNamed:@"timer27.png"],
      [UIImage imageNamed:@"timer28.png"],
      [UIImage imageNamed:@"timer29.png"],
      [UIImage imageNamed:@"timer30.png"],
      [UIImage imageNamed:@"timer31.png"],
      [UIImage imageNamed:@"timer32.png"],
      [UIImage imageNamed:@"timer33.png"],
      [UIImage imageNamed:@"timer34.png"],
      [UIImage imageNamed:@"timer35.png"],
  //      [UIImage imageNamed:@"timer36.png"], save last picture for "times up"
      nil];
timerAnimation.animationDuration = 5.0;
timerAnimation.animationRepeatCount = 1;
[timerAnimation startAnimating];

This will run your animation until you call [timerAnimation stopAnimating];