How do I animate a UIButton between two PNG images?

Question

I have two PNGs I want to use as a button. How can I animate a UIButton by switching rapidly between these two images?

Answer 1

You can use animationImages property of your button's imageView:

myButton.imageView.animationImages =
[NSArray arrayWithObjects:[UIImage imageNamed:@"image1.png"],
                          [UIImage imageNamed:@"image2.png"],
                          nil];
myButton.imageView.animationDuration = 0.5; //whatever you want (in seconds)
[myButton.imageView startAnimating];

Your button will switch between your two images.

EDIT: As @tidbeck pointed the button needs to have an image assigned to create the imageview property.