1.首先要先分清实现的过程，目测应该是使用了苹果自带的UIview类方法：

• (void)transitionFromView:(UIView *)fromView toView:(UIView *)toView duration:(NSTimeInterval)duration options:       (UIViewAnimationOptions)options completion:(void (^)(BOOL finished))completionNS_AVAILABLE_IOS(4_0);

2.那么我们需要在一个view上建立两个uiimageview，来实现相互交替翻转效果。

暂且叫做userIconView,两个imageview叫做,imageview1，imageview2;

3.为了判别哪个imageview在外层，我们设置一个bool变量_isImageView1Up;

4.集成SDImageView第三方库，可以实现同一个view中更换用户头像的翻转效果。

核心代码

-(void)OverTurn360WithTime:(float)time WithImageURL:(NSString *)imageStr{
    !_isImageView1Up ? ([imageView1 loadImage:imageStr]) : ([imageView2 loadImage:imageStr]);
    [UIView transitionFromView:(_isImageView1Up ? imageView1 : imageView2)
                        toView:(_isImageView1Up ? imageView2 : imageView1)
                      duration: time
                       options: UIViewAnimationOptionTransitionFlipFromLeft+UIViewAnimationOptionCurveEaseInOut
                    completion:^(BOOL finished) {
                        if (finished) {
                            _isImageView1Up = !_isImageView1Up;
                        }
                    }
     ];
}