iOS取消屏幕旋转时的动画

适用于iOS8以后

-(void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id)coordinator{
    [superviewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    [CATransactionbegin];
    [CATransactionsetDisableActions:YES];
    [coordinator animateAlongsideTransition:^(id _Nonnull context) {
    } completion:^(id _Nonnull context) {
        [CATransactioncommit];
    }];

}