ModalViewController 加载在另一个 Modal 之上

可能有更好的方法来做到这一点，如果有请指导我。

我正在创建一个UIImagePickerController在 viewDidAppear 中使用 overrideView 来表示“从库中选择”、“拍照”、“闪光灯”、“相机源”等。

// Set up the camera
imagePicker = [[UIImagePickerController alloc] 
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.delegate = self;

imagePicker.cameraOverlayView = [self cameraOverlayView];
cameraOverlayView.backgroundColor = [UIColor clearColor];
imagePicker.showsCameraControls = NO;
imagePicker.toolbarHidden = YES;

imagePicker.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:imagePicker animated:YES]; 

然后，我有一个 IBAction 调用我的“从库函数中选择”，加载另一个 UIImagePickerController 以从设备中选择照片。

- (IBAction)library:(id)sender
{
    UIImagePickerController *libraryPicker = [[[UIImagePickerController alloc] init] autorelease];

    libraryPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    libraryPicker.delegate = self;

    [self.imagePicker presentModalViewController:libraryPicker animated:YES];
}

当出现“从库中选择”模式时，我会在顶部看到一个大约状态栏大小的白色条。我知道这与在模态之上叠加模态有关，但我不知道如何解决它。 （即，我的“拍照”视图布局导航良好，尽管不显示额外的“从库中选择”模式）。

有任何想法吗？任何帮助或指导将不胜感激！

Try

[self presentModalViewController:libraryPicker animated:YES];

代替

[self.imagePicker presentModalViewController:libraryPicker animated:YES];