GCD延迟实现的动画 效果

通过自身调自身这种方法实现的动画经常出各种问题,现在改用GCD延迟下调自身这种方法：

/**

 *  动画效果

 */

//- (void)circularCharingAnimation

//{

//    NSLog(@"--------------------------------------");

//    if (self.circularStopFlag) return;

//    [UIView animateWithDuration:2.0 animations:^{

//

//        self.circularImageView.alpha = 0.0;

//        self.circularImageView.frame = CGRectMake(0, 0, 260.0, 260.0);

//        self.circularImageView.center = self.cycleView.center;

//        

//    } completion:^(BOOL finished) {

//        self.circularImageView.alpha = 1.0;

//        self.circularImageView.frame = CGRectMake(0, 0, 184.0, 184.0);

//        self.circularImageView.center = self.cycleView.center;

//        [self circularCharingAnimation];

//    }];

//}

- (void)circularCharingAnimation

{

    if (self.circularStopFlag) return;

    

    [UIView animateWithDuration:2.0 animations:^{

        

        self.circularImageView.alpha = 0.0;

        self.circularImageView.frame = CGRectMake(0, 0, 260.0, 260.0);

        self.circularImageView.center = self.cycleView.center;

        

    }];

    

    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2.0 * NSEC_PER_SEC));

    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){

        

        self.circularImageView.alpha = 1.0;

        self.circularImageView.frame = CGRectMake(0, 0, 184.0, 184.0);

        self.circularImageView.center = self.cycleView.center;

        

        [self circularCharingAnimation];

    });

}