1.
int count = 4; double duration = 10.0f; for (int i=0; i<count; i++) { //旋转动画 CABasicAnimation *anima3 = [CABasicAnimation animationWithKeyPath:@"transform.rotation"]; anima3.toValue = [NSNumber numberWithFloat:M_PI*2]; anima3.beginTime = (1.0/count)*duration*i; anima3.duration = (1.0/count)*duration; if (i == 0) { anima3.speed = 1; } else { anima3.speed = i+1; anima3.repeatCount = i+1; } [arr addObject:anima3]; } //组动画 CAAnimationGroup *groupAnimation = [CAAnimationGroup animation]; groupAnimation.animations = arr;//[NSArray arrayWithObjects:anima3, nil]; groupAnimation.duration = duration; groupAnimation.removedOnCompletion = NO; [self.layer addAnimation:groupAnimation forKey:@"groupAnimation"];