UIImagePickerController在iOS設備上工作但在iOS模擬器上沒有？

Question

我一直在物理iOS設備上運行我的應用程序一段時間沒有任何問題。 但是現在UIImagePickerController視圖不會出現在模擬器上。 我已經使用此處的方法將照片保存到模擬器中，並確認它們確實存在於圖像庫中的模擬器上。 Xcode中沒有彈出錯誤。 我嘗試過使用不同的源類型，但無濟於事。 知道我可能做錯了什么嗎？ 非常感謝！

碼

    UIImagePickerControllerSourceType sourceType;
    if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
            {
                sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
            }
            else
            {
                sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
            }
            //Display photo library.
            [self startImagePickerControllerFromViewController: self
                                            usingDelegate: self
                                           withSourceType: sourceType];

...

- (BOOL)startImagePickerControllerFromViewController:(UIViewController*) controller
                                  usingDelegate:(id <UIImagePickerControllerDelegate,
                                                     UINavigationControllerDelegate>) delegate
                                 withSourceType:(UIImagePickerControllerSourceType) sourceType
{
    //Insure camera, controller, and delegate exist.
    if (([UIImagePickerController isSourceTypeAvailable:
          UIImagePickerControllerSourceTypeCamera] == NO)
        || (delegate == nil)
        || (controller == nil))
        return NO;

    //Create the ImagePicker.
    UIImagePickerController *imagePickerUI = [[UIImagePickerController alloc] init];
    imagePickerUI.sourceType = sourceType;
    //Only allow still images.
    imagePickerUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeImage, nil];
    //Turn off editing.
    imagePickerUI.allowsEditing = NO;
    //Set the delegate.
    imagePickerUI.delegate = delegate;
    //Present the picker view.
    [controller presentViewController:imagePickerUI animated:YES completion:nil];

    return YES;
}

Answer 1

  if (([UIImagePickerController isSourceTypeAvailable:
      UIImagePickerControllerSourceTypeCamera] == NO)

上述條件確保模擬器無法運行它，因為模擬器沒有攝像頭。