iphone - 显示并关闭模态视图 Controller UIImagePickerController 之后，我的 Cocos2d iPhone 应用程序不再看到多次触摸

Question

我有一个应用程序，可以在其中显示照片选择器(UIImagePickerController)，但在用户关闭后，只有单次触摸才起作用。我想我知道问题的根源，但我不知道如何解决它......在显示模式对话框之前，触摸期间的堆栈如下:

...#3  0x00074de0 in -[EAGLView touchesBegan:withEvent:] at EAGLView.m:289#4  0x30910f33 in -[UIWindow _sendTouchesForEvent:]...

But after showing and then removing the modal dialog the stack has these two mysterious forwardMethod2 calls:

...#3  0x00074de0 in -[EAGLView touchesBegan:withEvent:] at EAGLView.m:289#4  0x3098dc95 in forwardMethod2#5  0x3098dc95 in forwardMethod2#6  0x30910f33 in -[UIWindow _sendTouchesForEvent:]...

Here is the code I use to display and remove the UIImagePickerController:Notes: 1. pickerViewController is a member of this class that extends UIViewController) 2. Director is from Cocos2D and contains only a single view attached directly in the root window called openGLView, which is why I made a UIViewController to house my image picker.

-(void)choosePhoto: (id)sender{
    UIImagePickerController *imagePickerController = pickerViewController.imagePickerController;
    imagePickerController.delegate = self;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePickerController.allowsImageEditing = YES;

    UIView *theView = [[Director sharedDirector] openGLView];
    UIView *pickerViewControllerView = pickerViewController.view;
    [theView addSubview:pickerViewControllerView];
    [pickerViewController presentModalViewController:imagePickerController animated:YES];
}

以及关闭对话框的代码:

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)imagePickerController
{
    // Dismiss the image selection
    [pickerViewController dismissModalViewControllerAnimated:YES];
    [pickerViewController.view removeFromSuperview];

    // HERE... IS THERE MORE WORK TO BE DONE TO COMPLETELY REMOVE THE PICKER VIEW????
}

在清理选择器 View 时一定缺少一些东西...非常感谢帮助:)

Answer 1

从根窗口向下调查 View 层次结构后，我发现在关闭照片选择器后，我的 viewController 的 View 被添加为 UITransitionView 下的 subview ，因此解决方案是删除我的 viewController View 的 super View :

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)imagePickerController
{
    // Dismiss the image selection
    [pickerViewController dismissModalViewControllerAnimated:YES];
    [pickerViewController.view.superview removeFromSuperview];
}