Stop animateWithDuration

Question

I have a cycle animate in viewController

- (void)moveAnimating
{
    [UIView animateWithDuration:2.0f animations:^{
        _backgroundView.center = CGPointMake(self.center.x , self.center.y - kMoveDistanceHeight);
     } completion:^(BOOL finished) {
        if (_backgroundView.animating)
        {
           [_backgroundView moveAnimating];
        }
    }];
}

I want stop this animate When the viewController viewWillDisappear:

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    _backgroundView.animating = NO;
    [_backgroundView.layer removeAllAnimations];
}

Because the animation is conflict with dismissViewcontrollerAnimation.

Question:

[_backgroundView.layer removeAllAnimations];

not work...

How to stop the animation？

Help me,thanks.

Answer 1

You are canceling animations correctly:

[_backgroundView.layer removeAllAnimations];

But you might forget about importing QuartzCore.h:

#import <QuartzCore/QuartzCore.h>

If it doesn't help try this:

[CATransaction begin];
[_backgroundView.layer removeAllAnimations];
[CATransaction commit];

If it doesn't help try to add this line to the code above:

[CATransaction flush];