-(void)loopBasecAnimation
{
CABasicAnimation *rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
rotationAnimation.toValue = [NSNumber numberWithFloat:M_PI * 2.0];
rotationAnimation.duration = 0.2;
rotationAnimation.cumulative = YES;
rotationAnimation.repeatCount =ULLONG_MAX;
[failedTipImageView.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}
-(void)stopLoopAnimation
{
[failedTipImageView.layer removeAllAnimations];
}