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:.f];
animation.toValue = [NSNumber numberWithFloat: M_PI *];
animation.duration = ;
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 += ;
[selfstartAnimation];
}
方法一
//方法二：(使用Block)
- (void)startAnimation
{
CGAffineTransform endAngle = CGAffineTransformMakeRotation(angle * (M_PI /180.0f));
[UIView animateWithDuration:.01delay: options:UIViewAnimationOptionCurveLinearanimations:^{
self.myImageView.transform = endAngle;
} completion:^(BOOL finished) {
angle += ;
[selfstartAnimation];
}];
}