日常杂记--2

1、view页面翻转

    UIViewAnimationOptions option = _isLeft?UIViewAnimationOptionTransitionFlipFromLeft:UIViewAnimationOptionTransitionFlipFromRight;

　　// 法一

    [UIView transitionFromView:_view1 toView:_view2 duration:.35 options:option completion:nil];

   //法二

    [UIViewtransitionWithView:self.contentViewduration:.35options:option animations:^{

        [self.contentViewexchangeSubviewAtIndex:0withSubviewAtIndex:1];

    } completion:^(BOOL finished) {

    }];

    //法三

    [UIViewanimateWithDuration:.55animations:^{

        [UIViewsetAnimationTransition:UIViewAnimationTransitionFlipFromLeftforView:self.viewcache:YES];

    }];