viewWillDisappear和viewDidDisappear永远不会被调用

Question

我为PopoverController创建了自己的类(没有子类化UIPopoverController)以我想要的方式呈现ViewControllers.

CustomPopoverController不是UIViewController,而是有一个名为"contentViewController"的ivar,它实际上是显示的VC.

当用户点击contentViewController框架之外的任何地方时,我实现了自己的"dismissPopoverAnimated:"以解除我的自定义弹出窗口:

-(void) dismissPopoverAnimated : (BOOL) animated
{
     // dismissalView is the view that intercept the taps outside.
    [self.dismissalView removeFromSuperview];
    self.dismissalView = nil;
    if (animated)
    {
        CGRect newFrame = self.view.frame;
        // When in landscape Mode the width of the screen is actually the "height"
        newFrame.origin.y = [UIScreen mainScreen].bounds.size.width;

        [UIView animateWithDuration:0.5 
                         animations:^{self.view.frame = newFrame;} 
         completion: ^(BOOL finished) {if(finished) [self.contentViewController.view removeFromSuperview];}];
    }
    else 
    {
        [self.contentViewController.view removeFromSuperview];
    }
    isPresented = NO;
    [self.delegate customPopoverDidDismissPopover:self];
}

问题是,即使removeFromSuperView在任何情况下被调用 - 动画与否,contentViewController永远不会接收viewWillDisappear,viewDidDisappear或者即使viewDidUnload我正在发布contentViewController;

有谁知道为什么？或者甚至更好地在viewWill .../viewDid ...方法链上抛出一些亮点,以及它们应该被调用的时间.

Answer 1

当您添加子视图或通过UIView的方法删除子视图,它不会导致国有UIViewController呼叫viewWillAppear,viewDidAppear,viewWillDisappear,和viewDidDisapper.只有那些通过的viewController的方法管理UINavigationController,如pushViewController:animated:或popViewControllerAnimated:,或presentModelViewController:aniamted:......等,他们将通知有关情况正在改变控制器的看法.