The problem is that an animation that uses UIViewAnimationOptionRepeat
never finishes and therefore never calls the completion
block. However, you can repeat the animations using the performSelector
method, as shown in the code below.
- (void)repeatingAnimationForView:(UIView *)view
{
[UIView animateWithDuration:1 delay:0 options:0
animations:^{ view.frame = CGRectMoveByXPixels(view.frame, -100); }
completion:^(BOOL finished) { if ( finished ) {
[UIView animateWithDuration:0.5 delay:0 options:0
animations:^{ view.alpha = 0; }
completion:^(BOOL finished) { if ( finished ) {
view.frame = CGRectMoveByXPixels(view.frame, 100);
[UIView animateWithDuration:0.5 delay:0 options:0
animations:^{ view.alpha = 1; }
completion:^(BOOL finished) { if ( finished ) {
if ( self.enableRepeatingAnimation )
[self performSelector:@selector(repeatingAnimationForView:) withObject:view afterDelay:0];
}}]; }}]; }}];
}
- (void)stopRepeatingAnimationForView:(UIView *)view
{
self.enableRepeatingAnimation = NO;
[view.layer removeAllAnimations];
view.frame = CGRectMake( 100, 137, 80, 50 );
view.alpha = 1;
}
- (void)startRepeatingAnimationForView:(UIView *)view
{
self.enableRepeatingAnimation = YES;
[self repeatingAnimationForView:view];
}
To stop the animations immediately, call the stopRepeatingAnimationForView
method as shown above. To stop the animations at the end of a cycle, simply set self.enableRepeatingAnimation
to NO
.