[UIView animateWithDuration:_dismissAnimationDuration
                      delay:0.0
                    options:UIViewAnimationOptionCurveEaseIn
                 animations:^(void) {
                     _menuContainerView.transform = CGAffineTransformMakeScale(0.0,0.0);
                 }
                 completion:^(BOOL finished){
                     if ([_delegate respondsToSelector:@selector(popUpMenuDidClose)])
                     {
                         [_delegate popUpMenuDidClose];
                     }

                     [self.view removeFromSuperview];
                     [self removeFromParentViewController];
                 }];

当从XCode 5构建到运行iOS 7和iOS 8的设备上时,这是非常有效的.但是,一旦我从XCode 6(beta 6和beta 7)构建到iOS 8,这个视图就会切换而不是动画.如果一旦将目标规模改为(0.001,0.001),那么这一点并不奇怪,无论XCode版本如何,它都会动态化.任何想法,为什么我不能用XCode 6动画实际(0.0,0.0)的比例？