当我使用UIImagePickerController时,为什么我的相机界面会很奇怪？

Question

在我的应用程序中,我希望用户能够拍照或使用照片库中的照片.当用户点击按钮时,我弹出警报视图,用户可以选择拍摄新照片或照片库中的照片.这是我用过的代码:

    - (void)PictureAlert:(id)sender {

    UIAlertView *AlertDialog;

    // Setting up AlertDialog.
    AlertDialog = [[UIAlertView alloc] initWithTitle:nil 
                                             message:nil 
                                            delegate:self 
                                   cancelButtonTitle:@"Cancel" 
                                   otherButtonTitles:@"Choose From Library", @"Take New Picture", nil];

    [AlertDialog show]; }

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {

    NSString *ButtonTitle = [alertView buttonTitleAtIndex:buttonIndex];

    if ([ButtonTitle isEqualToString:@"Choose From Library"]) {

        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

            // Pick photo.
            UIImagePickerController *picker = [[UIImagePickerController alloc] init];
            picker.delegate = self;
            picker.allowsEditing = YES;
            picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;

            [self presentModalViewController:picker animated:YES];


        } else if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

            // Setting up AlertDialog.
            UIAlertView *AlertDialog;

            AlertDialog = [[UIAlertView alloc] initWithTitle:@"Error accessing photo library" 
                                                     message:@"Device does not support a photo library"  
                                                    delegate:self 
                                           cancelButtonTitle:@"Dismiss" 
                                           otherButtonTitles:nil];

            [AlertDialog show];

        }


    } else if ([ButtonTitle isEqualToString:@"Take New Picture"]) {

        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

            // Take new photo.
            UIImagePickerController *picker = [[UIImagePickerController alloc] init];
            picker.delegate = self;
            picker.allowsEditing = YES;
            picker.wantsFullScreenLayout = YES;
            picker.sourceType = UIImagePickerControllerSourceTypeCamera;

            [self presentModalViewController:picker animated:YES];


        } else if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

            // Setting up AlertDialog.
            UIAlertView *AlertDialog;

            AlertDialog = [[UIAlertView alloc] initWithTitle:@"Error accessing camera" 
                                                     message:@"Device does not support a camera"  
                                                    delegate:self 
                                           cancelButtonTitle:@"Dismiss" 
                                           otherButtonTitles:nil];

            [AlertDialog show];

        }

    }

}

问题是,如果用户想要拍摄新照片,则会弹出相机界面,然后如果您旋转设备,界面将如下所示:

然后当用户将其旋转回来时,突然看起来像这样:

一个小问题是相机需要很长时间才能加载.

任何想法将不胜感激:)

Answer 1

有时，如果您使用的是具有当前操作系统的老一代 iPhone，例如您使用的是 iPhone 3G，并将其 ios 更新到 ios5，那么您安装的某些应用程序的行为可能会有所不同，您可以将您的应用程序检查到另一台设备以进行纠正你的问题。