如何使用自定义视图控制器扩展 UIImagePickerController？
因为 UIImagePickerController 的默认裁剪框（使用设置 setAllowsEditing:YES 时）对我来说不合适，所以我创建了一个自定义视图控制器，如建议的 此处。
当从 UIImagePickerController 选择缩略图时，我从 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 打开此自定义视图控制器 (navigationController) ：
[popoverController setContentViewController:navigationController animated:YES];
但似乎 UIImagePickerController 已经关闭，因为自定义视图控制器没有动画呈现。当我取消自定义视图控制器时，我无法返回到 UIImagePickerController 的缩略图视图。有没有办法扩展 UIImagePickerController 以便在取消自定义视图控制器时返回到 UIImagePickerController ？
谢谢！
Because the default cropping frame of an UIImagePickerController (when using the setting setAllowsEditing:YES) isn't the right size for me I've created a custom view controller, like suggested here.
When a thumbnail is selected from the UIImagePickerController I open this custom view controller (navigationController) from - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info:
[popoverController setContentViewController:navigationController animated:YES];
But it seems that the UIImagePickerController is already closed, because the custom view controller is presented without animation. And when I cancel the custom view controller I can't go back to the UIImagePickerController's thumbnail view. Is there a way to extend the UIImagePickerController so you return to the UIImagePickerController when canceling the custom view controller?
Thanks!
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UIImagePickerController 是一个 UINavigationController。这意味着您可以根据需要将内容推送到堆栈中或将其弹出。无需设置新的视图控制器，只需将控制器推入图像选择器堆栈即可。
UIImagePickerController is a UINavigationController. That means you can push and pop things onto the stack all you want. Instead of setting a new view controller, just push your controller onto the image picker stack.