UIImagePickerControllerDelegate返回空白"editingInfo"字典对象

Question

我有一个iPhone应用程序调用UIImagePickerController,让人们可以选择通过相机选择图像或通过手机上的照片库.问题是,有时,(不能总是让它复制.),应该由didFinishPickingImage委托消息返回的editingInfo字典对象,返回空白或(null).有没有人见过这个？

我正在我的.h文件中实现UIImagePickerControllerDelegate,我正在实现两个委托方法:didFinishPickingImage和imagePickerControllerDidCancel.

任何帮助将不胜感激.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.不推荐的方法

UIImagePickerController方法:

– imagePickerController:didFinishPickingImage:editingInfo:

在iPhone OS的v3.0中已弃用.所以即使我使用SDK v2.2.1构建了应用程序,因为应用程序将在3.0设备上运行,我需要使用新的改进方法:

- imagePickerController:didFinishPickingMediaWithInfo:editingInfo

2.解雇ModalView

从库中选择图片或使用内置摄像头拍摄照片后,您必须做的第一件事就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.以下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];   
  }

}

我希望这可以帮助需要它的人.

谢谢,

L.