iOS开发动画(Animation)图片360度不停旋转

{
    CGFloat angle;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    angle = 0;
    [self startAnimation];
}

//方法1
-(void) startAnimation
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.01];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(endAnimation)];
    self.scanImage.transform = CGAffineTransformMakeRotation(angle * (M_PI / 180.0f));
    [UIView commitAnimations];
}

-(void)endAnimation
{
    angle += 2;
    [self startAnimation];
}

//方法2
- (void)startAnimation
{
    CGAffineTransform endAngle = CGAffineTransformMakeRotation(angle * (M_PI / 180.0f));
    
    [UIView animateWithDuration:0.01 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
        self.scanImage.transform = endAngle;
    } completion:^(BOOL finished) {
        angle += 2; [self startAnimation];
    }];
}