Restoring animation where it left off when app resumes from background

Question

I have an endlessly looping CABasicAnimation of a repeating image tile in my view:

a = [CABasicAnimation animationWithKeyPath:@\"position\"];
a         


        

Answer 1

I was recognizing the gesture state like so:

// Perform action depending on the state
switch gesture.state {
case .changed:
    // Some action
case .ended:
    // Another action

// Ignore any other state
default:
    break
}

All I needed to do was change the .ended case to .ended, .cancelled.