ios - UISplitViewController 的主细节 Controller 的动画可见性

Question

在我的 UISplitViewController 中，我希望主视图 Controller 仅在处于纵向方向时或当我的详细 View Controller 未显示 Controller 类型 MyFullScreenViewController 时才允许显示。我已经实现了 UISplitViewControllerDelegate 以适本地指示这一点。

-(BOOL)splitViewController:(UISplitViewController *)svc
  shouldHideViewController:(UIViewController *)vc
             inOrientation:(UIInterfaceOrientation)orientation
{
    if (UIInterfaceOrientationIsPortrait(orientation) ||
        [[self.navigationController topViewController] isKindOfClass:[MyFullScreenViewController class]])
    {
        return YES;
    }
    return NO;
}

但是，UISplitViewController 仅在旋转期间调用委托(delegate)。所以 MyFullScreenViewController 实现了 viewWillAppear:animated 和 viewWillDisappear:animated。

- (void)viewWillAppear:(BOOL)animated
{
    [self fakeRotationOfSplitViewController];
    [super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
    [self fakeRotationOfSplitViewController];
    [super viewWillDisappear:animated];
}
-(void)fakeRotationOfSplitViewController
{
    UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
    CGFloat duration = 1.0f;
    CGFloat fakeDuration = 0.0f;

    [UIView animateWithDuration:duration
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         [[self splitViewController] willAnimateRotationToInterfaceOrientation:orientation
                                                                                      duration:fakeDuration];
                         [[self splitViewController] willRotateToInterfaceOrientation:orientation
                                                                             duration:fakeDuration];
                         [[self splitViewController] didRotateFromInterfaceOrientation:orientation];
                     } completion:^(BOOL finished) {

                     }];

}

除动画外一切正常。主视图 Controller 在 UINavigationController 对象推送之前和弹出动画之前立即消失并重新出现。

文档不清楚 willRotateToInterfaceOrientation:duration: 和 didRotateFromInterfaceOrientation: 是否应该在动画 block 中调用，但我怀疑它们不应该允许 View Controller 动画它响应消息而变化。但是，如果它们落在动画 block 之外，主视图 Controller 有时会消失。

Answer 1

动画不工作，因为我从未在 didRotateFromInterfaceOrientation: 之后调用 viewWillLayoutSubviews。

[UIView animateWithDuration:duration
                          delay:0.0f
                        options:UIViewAnimationOptionCurveEaseInOut
                     animations:^{
                         [[self splitViewController] willAnimateRotationToInterfaceOrientation:orientation
                                                                                      duration:fakeDuration];
                         [[self splitViewController] willRotateToInterfaceOrientation:orientation
                                                                             duration:fakeDuration];
                         [[self splitViewController] didRotateFromInterfaceOrientation:orientation];
                         [[self splitViewController] viewWillLayoutSubviews];
                         [[[self splitViewController] view] layoutSubviews];
                     } completion:^(BOOL finished) {

                     }];