Why does the view disappear after an animation? - ios

Question

I've been trying to animate an image using this code.
- (void)viewDidLoad
{
dice.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"image1.png"],
[UIImage imageNamed:#"image2.png"],
[UIImage imageNamed:#"image3.png"], nil];
[dice setAnimationRepeatCount:3];
dice.animationDuration = 1;
[super viewDidLoad];
// Do any additional setup after loading the view.
}
Then I have a button that makes the animation play.
-(IBAction) animate:(id)sender {
[dice startAnimating];
}
Everything works perfectly. The animation plays 3 times with duration of 1 second each time. However after the animation has played 3 times, the dice image view simply disappears from the screen. How do I stop this from happening so the image doesn't disappear and I can do other stuff to the image view?

Answer 1

Are you setting dice.image anywhere? The animations are different than the image the imageView contains, and "play in front of" the image and then are removed. I recommend using UIImageView's startAnimatingWithCompletionBlock method:
- (void) viewDidload {
dice.image = [UIImage imageNamed:#"image3.png"]; // big assumption on my part
// the assumption is that this is the image you want
// after animating
dice.animationImages = [NSArray arrayWithObjects:
[UIImage imageNamed:#"image1.png"],
[UIImage imageNamed:#"image2.png"],
[UIImage imageNamed:#"image3.png"], nil];
[dice setAnimationRepeatCount:3];
dice.animationDuration = 1
[super viewDidLoad];
}
A "block" is a chunk of one or more lines of code that wait until after the animation finishes to be executed. If you set the image beforehand it will appear "behind" the animations as they run and may not be what you want.