检测UIPopoverController何时完成呈现UIImageViewcontroller

问题描述

我将UIImagePickerController作为UIPopoverController的内容视图控制器。我需要检测弹出窗口刚刚完成呈现的时间（刚出现）。 UIPopoverController没有任何委托。我似乎无法找到一种方法来检测UIImagePickerController。 （适用于iPad）

I have the UIImagePickerController as a content View Controller for the UIPopoverController. I need to detect when the popover has just finished presented (has just showed up). UIPopoverController does not have any delegate for this. I can't seem to find a way to detect the UIImagePickerController as well. (This is for iPad)

有任何建议吗？

// UIImagePickerController let's the user choose an image.
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
self.popover = [[UIPopoverController alloc] initWithContentViewController:imagePicker];
self.popover.delegate = self;
[self.popover presentPopoverFromBarButtonItem:self.openPhotosButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

推荐答案

UIImagePickerDelegate也是UINavigationControllerDelegate。

The UIImagePickerDelegate is also a UINavigationControllerDelegate.

您的类应该实现UINavigationControllerDelegate并包含以下内容：

Your class should implement UINavigationControllerDelegate and include the following:

 -(void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
     // [navigationController setNavigationBarHidden:YES];
      [[UIApplication sharedApplication] setStatusBarHidden:YES];  // This one works for me: OP
    }

我已经测试了这个和它隐藏导航栏。我不确定这样做是否与HIG发生冲突。

I've tested this and it hides the navigation bar. I am not sure if doing so conflicts with the HIG though.

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