iphone - UIImagePickerControllerDelegate 返回空白 "editingInfo"字典对象

Question

我有一个 iPhone 应用程序，它调用 UIImagePickerController 让人们可以选择通过相机或通过手机上的照片库选择图像。问题是，有时(不能总是让它复制。)，本应由 didFinishPickingImage 委托(delegate)消息返回的 editorialInfo 字典对象返回空白或 (null)。其他人以前见过这个吗？

我正在 .h 文件中实现 UIImagePickerControllerDelegate，并且正确实现了两个委托(delegate)方法:didFinishPickingImage 和 imagePickerControllerDidCancel。

任何帮助将不胜感激。预先感谢您!

这是我的代码...

我的.h文件:

@interface AddPhotoController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> {
  IBOutlet UIImageView *imageView;
  IBOutlet UIButton *snapNewPictureButton;
  IBOutlet UIButton *selectFromPhotoLibraryButton;
}
@property (nonatomic, retain) UIImageView *imageView;
@property (nonatomic, retain) UIButton *snapNewPictureButton;
@property (nonatomic, retain) UIButton * selectFromPhotoLibraryButton;

我的 .m 文件:

@implementation AddPhotoController
@synthesize imageView, snapNewPictureButton, selectFromPhotoLibraryButton;

- (IBAction)getCameraPicture:(id)sender 
{

  UIImagePickerController *picker = [[UIImagePickerController alloc] init];
  picker.delegate = self;
  picker.sourceType = UIImagePickerControllerSourceTypeCamera;
  picker.allowsImageEditing = YES;

[self presentModalViewController:picker animated:YES];
[picker release];
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo 
{
NSLog(@"Image Meta Info.: %@",editingInfo);

UIImage *selectedImage = image;
imageView.image = selectedImage;
self._havePictureData = YES;
[self.useThisPhotoButton setEnabled:YES];

[picker dismissModalViewControllerAnimated:YES];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker 
{
  [picker dismissModalViewControllerAnimated:YES];
}

Answer 1

我解决了这个问题。我在这里发布我的答案，希望它可以帮助处于类似情况的其他人:

1。已弃用的方法

UIImagePickerController 方法:

– imagePickerController:didFinishPickingImage:editingInfo:

在 iPhone OS v3.0 中已弃用。因此，即使我使用 SDK v2.2.1 构建应用程序，由于该应用程序将在 3.0 设备上运行，我需要使用新的改进方法:

- imagePickerController:didFinishPickingMediaWithInfo:editingInfo

2。关闭 ModalView

从库中选择图片或使用内置相机拍摄照片后，您必须做的第一件事是关闭选取器的模态视图窗口。之后，您可以执行任何图像处理例程。这是该方法的最终代码:

- (void) imagePickerController:(UIImagePickerController *)thePicker didFinishPickingMediaWithInfo:(NSDictionary *)imageInfo 
{
  [thePicker dismissModalViewControllerAnimated:YES];
  UIImage *img = [imageInfo objectForKey:@"UIImagePickerControllerEditedImage"];
  previewImage.image = nil;
  self.previewImage.image = img;

  NSData *imageData = UIImagePNGRepresentation(img);
  if ([imageData length] > 0) {

    [self archivePictureData:imageData];
    self._havePictureData = YES;

    [self.useThisPhotoButton setEnabled:YES];   
  }

}

希望这对有需要的人有帮助。

谢谢

L.