360 旋转

- (void)rotateSpinningView

{

[UIView animateWithDuration:1.5 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{

self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, M_PI);

} completion:^(BOOL finished) {

[self rotateSpinningView];

}];

}

- (void) runSpinAnimationOnView:(UIView*)view duration:(CGFloat)duration rotations:(CGFloat)rotations repeat:(float)repeat;

{

CABasicAnimation* rotationAnimation;

rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];

rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations * duration ];

rotationAnimation.duration = duration;

rotationAnimation.cumulative = YES;

rotationAnimation.repeatCount = repeat;

[view.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];

}