1.先创建一个UIImageView.
- (void)createImageView { UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0,0.0, frame.size.width, frame.size.height)]; imageView.image = [UIImageimageNamed:@"image1.png"]; self.myImageView = imageView; [self addSubview:imageView]; }
问题：方法一二是让iamgeview 循环旋转角度，如果把imageview 放在tableviewcell上边，每次刷新tableview，imageview 的旋转速度会加倍；没有去做相应的处理，而是直接利用另一个旋转方法三
方法三：
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"]; //默认是顺时针效果，若将fromValue和toValue的值互换，则为逆时针效果 animation.fromValue = [NSNumber numberWithFloat:0.f]; animation.toValue = [NSNumber numberWithFloat: M_PI *2]; animation.duration = 1; animation.autoreverses = NO; animation.fillMode =kCAFillModeForwards; animation.repeatCount = MAXFLOAT; //如果这里想设置成一直自旋转，可以设置为MAXFLOAT，否则设置具体的数值则代表执行多少次 [self.imageView1.layer addAnimation:animation forKey:nil];
//方法一：
- (void)buttonAction:(id)sender { angle = 0.0; [selfstartAnimation]; } - (void)startAnimation { [UIView beginAnimations:nilcontext:nil]; [UIView setAnimationDuration:0.01]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(endAnimation)]; self.myImageView.transform = CGAffineTransformMakeRotation(angle * (M_PI /180.0f)); [UIView commitAnimations]; } -(void)endAnimation { angle += 15; [selfstartAnimation]; }