UIImagePickerController 在第二次取消时崩溃

Question

我在我的应用程序中使用 UIImagePickerController，每当我第二次单击取消时它就会崩溃并显示以下崩溃日志：

Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency', reason: 'child view controller: should have parent view controller:(null) but actual parent is:'

关闭代码：

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

相同的代码在其他应用程序中运行良好，但是当我将代码复制到新项目中时，崩溃反复发生。它发生在 iOS 8.3 和 7.1 上，未在其他版本上测试。任何帮助将不胜感激。

Answer 1

在 .h

中设置委托

@interface YourViewController : UIViewController < UIImagePickerControllerDelegate, UINavigationControllerDelegate>

当你想打开它时初始化图像选择器。

UIImagePickerController *imgPicker = [[UIImagePickerController alloc] init];
imgPicker.delegate = self;
imgPicker.allowsEditing = YES;
imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:imgPicker animated:YES completion:^{ }];

委托方法

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

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