Block动画

//参数1:改变的view 参数2:动画时长 参数3:动画类型 参数4:
    [UIView transitionWithView:self.changeView duration:1 options:UIViewAnimationOptionTransitionFlipFromRight animations:^{
        self.changeView.backgroundColor = [UIColor blackColor];
    } completion:^(BOOL finished) {
        if (finished) {
            NSLog(@"finished");//写上要处理的内容就是UIView属性动画和过渡动画的封装
        }
    }];
}