startAnimatingWithImagesInRange is not completing

Question

I need to animate series of images.

// Animate Circle
let duration = 1.0
circleGroup.setBackgroundImageNamed("arc")
circleGroup.startAnimatingWithImagesInRange(NSRange(location: 0, length: 100), duration: duration, repeatCount: 0)

I have 101 images. From arc0 to arc100.

Storyboard:

As you can see on the gif, my problem is that animation doesn't make full circle trip. Any suggestion?

Answer 1

Looks like animation is stopping right after 40%. I opened asset library and renamed every file to the exactly same name. Then I opened my Git client and I saw this changes:

Animation now works. As you can see, problem was in a file name, it had extra space in it.

Also I learned that when doing backward animation location becomes not the starting point but the destination.