Iphone didFinishPickingMediaWithInfo返回零照片

我正在使用

- (void)imagePickerController:(UIImagePickerController *)picker 
    didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [[picker parentViewController] dismissModalViewControllerAnimated:YES]; 

    // MediaType can be kUTTypeImage or kUTTypeMovie. If it's a movie then you
    // can get the URL to the actual file itself. This example only looks for images.
    //   
    NSString* mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    // NSString* videoUrl = [info objectForKey:UIImagePickerControllerMediaURL];

    // Try getting the edited image first. If it doesn't exist then you get the
    // original image.
    //
    if (CFStringCompare((CFStringRef) mediaType,  kUTTypeImage, 0) == kCFCompareEqualTo) {               
        UIImage* picture = [info objectForKey:UIImagePickerControllerEditedImage];
        if (!picture)
            picture = [info objectForKey:UIImagePickerControllerOriginalImage];             

        // **picture is always nil
            // info dictionary count = 1


    }

}

发生的情况是，信息字典总是返回一个条目：

{ UIImagePickerController中间类型= “公众形象”

这是伟大的，但从来没有一个形象

我用这个论坛上的一个很好的例子来做这件事，我很确定这些电话是正确的，但从来没有一张图片

---

提前感谢！

我知道这是几个月后的事了，但我为此挣扎了几个小时，在这个网站和iphonedevsdk.com上都发现了同样的问题，但从来没有找到有效的答案

总而言之，如果该图像是从相机卷/照片库中拾取的，则效果良好，但如果该图像是使用相机拍摄的新照片，则不会起作用。下面介绍如何使其同时适用于这两种情况：

您必须先关闭并释放UIImagePickerController，然后才能尝试对信息字典执行任何操作。要非常清楚：

这不起作用：

- (void)imagePickerController:(UIImagePickerController *)picker 
                      didFinishPickingMediaWithInfo:(NSDictionary *)info {

          // No good with the edited image (if you allowed editing)
  myUIImageView.image = [info objectForKey:UIImagePickerControllerEditedImage];
          // AND no good with the original image
  myUIImageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];
          // AND no doing some other kind of assignment
  UIImage *myImage = [info objectForKey:UIImagePickerControllerEditedImage];

  [picker dismissModalViewControllerAnimated:YES];
  [picker release];
}

- (void)imagePickerController:(UIImagePickerController *)picker 
                      didFinishPickingMediaWithInfo:(NSDictionary *)info {

  [picker dismissModalViewControllerAnimated:YES];
  [picker release];

          // Edited image works great (if you allowed editing)
  myUIImageView.image = [info objectForKey:UIImagePickerControllerEditedImage];
          // AND the original image works great
  myUIImageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];
          // AND do whatever you want with it, (NSDictionary *)info is fine now
  UIImage *myImage = [info objectForKey:UIImagePickerControllerEditedImage];
}

在所有这些情况下，图像都将为零

然而，通过首先释放UIImagePickerController的魔力

这确实有效：

- (void)imagePickerController:(UIImagePickerController *)picker 
                      didFinishPickingMediaWithInfo:(NSDictionary *)info {

          // No good with the edited image (if you allowed editing)
  myUIImageView.image = [info objectForKey:UIImagePickerControllerEditedImage];
          // AND no good with the original image
  myUIImageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];
          // AND no doing some other kind of assignment
  UIImage *myImage = [info objectForKey:UIImagePickerControllerEditedImage];

  [picker dismissModalViewControllerAnimated:YES];
  [picker release];
}

- (void)imagePickerController:(UIImagePickerController *)picker 
                      didFinishPickingMediaWithInfo:(NSDictionary *)info {

  [picker dismissModalViewControllerAnimated:YES];
  [picker release];

          // Edited image works great (if you allowed editing)
  myUIImageView.image = [info objectForKey:UIImagePickerControllerEditedImage];
          // AND the original image works great
  myUIImageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];
          // AND do whatever you want with it, (NSDictionary *)info is fine now
  UIImage *myImage = [info objectForKey:UIImagePickerControllerEditedImage];
}

---

非常简单，但仅此而已。

我也有同样的症状，但在我的案例中，我发现UIImagePickerController层次结构中有一个类别覆盖了“uuid”或“setUUID”？我想CoreData需要这些方法，否则它会变得非常、非常混乱，资产库都是CoreData的东西。

虽然Matthew Frederick的答案最受欢迎，而且长期以来一直是合适的回答，但从iOS 5.0开始，苹果公司推出了

DismissViewControllerImaged:completion:

，以取代现在已经弃用的（从iOS 6.0开始）

解除ViewController激活：

希望在完成块中执行图像信息字典检索对所有人都更有意义

以他上面的例子来说，现在看起来是：

- (void)    imagePickerController:(UIImagePickerController *)picker 
    didFinishPickingMediaWithInfo:(NSDictionary *)info 
{
    [picker dismissViewControllerAnimated:YES completion:^{
          // Edited image works great (if you allowed editing)
        myUIImageView.image = [info objectForKey:UIImagePickerControllerEditedImage];
          // AND the original image works great
        myUIImageView.image = [info objectForKey:UIImagePickerControllerOriginalImage];
          // AND do whatever you want with it, (NSDictionary *)info is fine now
        UIImage *myImage = [info objectForKey:UIImagePickerControllerEditedImage];
    }];
}

---

某些版本的XCode和Mountain Lion也存在已知的bug。请检查您的控制台以获取以下消息：

2013-01-17 21:36:34.946 3未找到名为“com.apple.persistentrurltranslator.Gatekeeper”的完整ios[5341:1803]服务。assetsd已关闭或配置错误。事情将无法按您期望的方式运行。

如果出现该消息，它可能无法工作。请在实际的iOS设备上检查您的应用程序

无论如何，重新启动模拟器和XCode似乎可以解决这个问题。

使用

[[UIImagePickerController alloc] init];

而不是

[[UIImagePickerController alloc] initWithNibName:(NSString *) bundle:(NSBundle *)];

---

我尝试了以上所有方法，但在iPad 6.0/6.1模拟器上没有成功，但我发现信息中包含“UIImagePickerController参考URL”键，下面是我的代码：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
  [picker dismissViewControllerAnimated:YES completion:NULL];

  UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage];
  if(NULL == image){
      [MyImageLoader loadImageFromAssertByUrl:[info objectForKey:@"UIImagePickerControllerReferenceURL"]
                                   completion:^(UIImage* img){
                                        //img not null here
                                   }];
  }else{
      //image not null here
  }
}

loadImageFromAssertByUrl的代码为：

+(void) loadImageFromAssertByUrl:(NSURL *)url completion:(void (^)(UIImage*)) completion{
  ALAssetsLibrary *assetLibrary=[[ALAssetsLibrary alloc] init];
  [assetLibrary assetForURL:url resultBlock:^(ALAsset *asset) {
      ALAssetRepresentation *rep = [asset defaultRepresentation];
      Byte *buffer = (Byte*)malloc(rep.size);
      NSUInteger buffered = [rep getBytes:buffer fromOffset:0.0 length:rep.size error:nil];
      NSData *data = [NSData dataWithBytesNoCopy:buffer length:buffered freeWhenDone:YES];
      UIImage* img = [UIImage imageWithData:data];
      completion(img);
  } failureBlock:^(NSError *err) {
      NSLog(@"Error: %@",[err localizedDescription]);
  }];
}

---

需要遵循以下步骤：
1） 制作UIActionSheet
2） 在选择必要的源类型时-重新加载资源
3） didFinishPickingMediaWithInfo-已接收图像字典中的图像集

    - (IBAction)actionButtonUpload:(id)sender {

             UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self 

cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Camera",@"Photo Library", nil];

         [actionSheet showInView:self.view];

    }

    #pragma mark -- UIActionSheet Delegate
    -(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{

        UIImagePickerController *picker = [[UIImagePickerController alloc] init];

        picker.delegate = self;
        picker.allowsEditing = YES;
        UIAlertView *alert;


        switch (buttonIndex) {
            case 0:
                if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

                    NSLog(@"No camera!");
                    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
                    [self presentViewController:picker animated:YES completion:NULL];


                } else {

                    alert = [[UIAlertView alloc]initWithTitle:@"Alumnikonnect" message:@"Camera is not available, please select a different media" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];

                    [alert show];

                }
                break;
            case 1:

                if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

                    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
                    [self presentViewController:picker animated:YES completion:NULL];


                } else {

                    alert = [[UIAlertView alloc]initWithTitle:@"Alumnikonnect" message:@"Photolibrary is not available, please select a different media" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];

                    [alert show];

                }

                break;

        }

    }


    #pragma mark - Image picker delegate

    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
    {
          self.imageEventPic.layer.cornerRadius =   self.imageEventPic.frame.size.height /2;
          self.imageEventPic.layer.masksToBounds = YES;
          self.imageEventPic.layer.borderWidth = 0;
          self.imageEventPic.layer.borderWidth = 1.0f;
          self.imageEventPic.layer.borderColor = [UIColor colorWithRed:0.212 green:0.255 blue:0.302 alpha:1.000].CGColor;


        self.labelUploadPic.hidden = YES;

        self.imageEventPic.image =  info[UIImagePickerControllerOriginalImage];

        [self dismissViewControllerAnimated:YES completion:NULL];

    }


    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
    {
        [self dismissViewControllerAnimated:YES completion:NULL];

    }

    -(UIImage*)imageWithImage:(UIImage*)image
                 scaledToSize:(CGSize)newSize;
    {
        UIGraphicsBeginImageContext( newSize );

        [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

        UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

        return newImage;

    }

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有人吗？这件事真是祸不单行！！！！你是认真的吗！？！这就是我的问题所在！天哪。_死了_我还没试过，但我想到了几个可能的选择。第一个是复制信息字典--

NSDictionary*infoDictionary=[NSDictionary dictionary dictionary withdictionary:info]

--然后清除选取器--选取器=nil。不确定这是否有效。另一个几乎可以肯定有效的选项是在Xcode中为图像选取代码创建一个单独的文件，并将该文件设置为不使用ARC，将解决方案保留在此处。谢谢..我可以让它工作，但方法是这样的。设置后我关闭相机uiimage。我不知道这可能是ios上的一个bug。哇。我遇到了一个类似的问题，这就完成了工作。现在我很好奇为什么会这样做？我没有看到这个错误，但在模拟器上，它工作的设备上的映像是空的…你确定它的

[picker dismissModalViewControllerAnimated:是的完成：

而不是

[picker DismissViewControllerInitiated:YES completion:^（void）

？对于我来说，在iPad模拟器（iOS 6.1）中运行iPhone应用程序仍然会产生一个零结果。事实上，这似乎是自iOS 5以来iPad模拟器中的一个长期缺陷，尽管它似乎在真实设备上工作。奇怪。因此，唯一的解决方案是使用资产库…谢谢！我不敢相信我们需要做这种事情来解决至少一年前报告的iPad模拟器中的一个缺陷，但至少它可以我在iPadAir和iOS8上也遇到了同样的问题，我通过这些代码解决了我的问题。谢谢。