objective-c - UIImagePickerController 和横向方向

Question

我有一个 UIImagePicker 来单击图片并从照片库中选择图片。但是我的应用程序必须只支持横向。照片库只能通过 ImagePicker 以纵向模式打开。我尝试将当前代码与 ALAssets 集成，但我对 AlAssets 库一无所知。我想使用图像选择器并让它在 startMediaBrowserFromViewController: 方法中调用 ALAssets。下面是方法定义。请给我一个解决方案。

//pick an image from photo gallery  

- (BOOL) startMediaBrowserFromViewController: (UIViewController*) controller
                               usingDelegate: (id <UIImagePickerControllerDelegate,
                                               UINavigationControllerDelegate>) delegate {


    if (([UIImagePickerController isSourceTypeAvailable:
          UIImagePickerControllerSourceTypeSavedPhotosAlbum] == NO)
        || (delegate == nil)
        || (controller == nil))
        return NO;
    UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];
    mediaUI.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    //provides access to photo albums in the device.
    mediaUI.mediaTypes=[[[NSArray alloc]initWithObjects:(NSString*)kUTTypeImage,nil]autorelease];
    // Hides the controls for moving & scaling pictures.
    mediaUI.allowsEditing = NO;   
    mediaUI.delegate = delegate;
    [controller presentModalViewController: mediaUI animated: YES];
    return YES;
}

Answer 1

UIImagePickerController 仅支持 UIInterfaceOrientationPortrait 方向，因此如果它是从横向 View Controller 呈现并不重要，它将以纵向方向显示，即使在 UIInterfaceOrientationPortraitUpsideDown