didFinishPickingMediaWithInfo return nil photo

Question

I am working to capture an image that is returned in 4.0 using

- (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


    }

}

What is happening is that the info dictionary always returns with a single entry:

{ UIImagePickerControllerMediaType = "public.image";

which is great, but there is never an image.

I was using a great example from this forum to do this, and I am pretty sure the calls are correct, but never an image.

Thanks in advance!

Any takers? Huge Karma bump on this one!!!! – Rob Bonner Jun 22 '10 at 14:03 — Rob Bonner, Jun 22 '10 at 14:03

score 53 · Answer 1 · answered Nov 16 '10 at 07:56

I know this is many months later, but I struggled with this for hours, and found this same question all over this site and iphonedevsdk.com, but never with a working answer.

To summarize, if the image was picked from the camera roll/photo library it worked fine, but if the image was a new photo take with the camera it never worked. Well, here's how to make it work for both:

You have to dismiss and release the UIImagePickerController before you try to do anything with the info dictionary. To be super-clear:

This DOES NOT work:

- (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];
}

In all of those cases the image will be nil.

However, via the magic of releasing the UIImagePickerController first...

This DOES work:

- (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];
}

Crazy simple, but that's all there is to it.

are you for serious!?! is this what my problem has been! OMG. *_dies_* — Stephen Furlani, Jan 06 '11 at 21:11
I haven't tried it yet, but a couple of options come to mind as possibilities. The first is to copy the info dictionary -- `NSDictionary *infoDictionary = [NSDictionary dictionaryWithDictionary:info]` -- and then nil out the picker -- `picker = nil`. Not sure if that'll work. The other option that almost assuredly will work is to create a separate file for the image picking code in Xcode and set that file to not use ARC, keeping the solution here. — Matthew Frederick, Mar 22 '12 at 22:24
thanks.. I got it working but the way around. I dismiss the camera after setting the uiimage. I don't know this maybe a bug on ios. — John Paul Manoza, May 14 '13 at 05:02
Wow. I came across a similar problem and this did the job. Now I'm curious why does this work? — Chan Jing Hong, Dec 28 '16 at 12:31

john.k.doe · Answer 2 · 2013-09-03T15:01:27.857

whilst Matthew Frederick's answer is most popular and has long been the appropriate response, as of iOS 5.0, apple made available dismissViewControllerAnimated:completion:, to replace the now deprecated (as of iOS 6.0) dismissViewControllerAnimated:.

performing the image info dictionary retrieval in the completion block should hopefully make more sense to all.

to take his example from above, it would now look like:

- (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];
    }];
}

You sure its `[picker dismissModalViewControllerAnimated:YES completion:` and not `[picker dismissViewControllerAnimated:YES completion:^(void)` ? — James Dunay, Aug 31 '13 at 07:11
This still produces a nil result for me, running an iPhone app in the iPad emulator (iOS 6.1). — Desty, Sep 05 '13 at 20:49
Actually it seems like it's a longstanding bug in the iPad emulator since iOS 5 - even though it seems to work on the real device. Strange. So the only solution is to use the asset library... — Desty, Sep 05 '13 at 21:03

score 4 · Answer 3 · answered Aug 14 '13 at 09:25

I've tried all above, but no luck on iPad 6.0/6.1 simulator, however i've found that info contains "UIImagePickerControllerReferenceURL" key and here is my code:

- (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
  }
}

and code for loadImageFromAssertByUrl is:

+(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]);
  }];
}

Thanks! I can't believe we need to do this kind of thing to work around a bug in the iPad emulator that was reported at least a year ago, but at least it can be worked around... — Desty, Sep 05 '13 at 21:51

juanignaciosl · Answer 4 · 2013-01-17T21:07:44.143

2

There's also a known bug with some versions of XCode and Mountain Lion. Check your console for this message:

2013-01-17 21:36:34.946 3sure-ios[5341:1803] Named service 'com.apple.PersistentURLTranslator.Gatekeeper' not found. assetsd is down or misconfigured. Things will not work the way you expect them to.

It probably won't work if that message appears. Check your app at the actual iOS device.

Nevetheless, restarting both simulator and XCode seems to fix the issue.

edited Jan 17 '13 at 21:07

answered Jan 17 '13 at 20:37

juanignaciosl

3,435
2
28
28

I did not see this error, but on simulator the image is null on device it works... – Justin Meiners Feb 19 '13 at 01:10

score 0 · Answer 5 · answered Apr 05 '12 at 00:40

I had the same symptoms, but in my case it turned out I had a category on something in the UIImagePickerController hierarchy that overrode "uuid" or "setUUID"? I guess CoreData needs these methods or it gets very, very confused, and the asset library is all CoreData stuff.

score 0 · Answer 6 · answered Jan 25 '13 at 06:01

0

use

[[UIImagePickerController alloc] init];

instead of

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

answered Jan 25 '13 at 06:01

yfguo

1
1

score 0 · Answer 7 · edited Mar 09 '15 at 11:12

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

    [picker dismissViewControllerAnimated:YES completion:NULL];
    //Image picker for nil value 
    UIImage* selectedImage = [info objectForKey:UIImagePickerControllerOriginalImage];
    NSLog(@"my Info :: %@", info);

    if(NULL == selectedImage){
      UIImage * selectedImage =  [PhotoViewController loadImageFromAssertByUrl:[info objectForKey:@"UIImagePickerControllerReferenceURL"]
                                     completion:^(UIImage * selectedImage){
                                         //img not null here
                                         NSLog(@"img2 ::: %@", selectedImage);
                                         uploadImg.image = selectedImage;
                                         [self.view addSubview:PermissionView];
                                     }];
    }else{
        //image not null here
        NSLog(@"Up IMG00 :: %@", uploadImg.image);
        NSLog(@"Sel IMG00 :: %@", selectedImage);
        uploadImg.image = [selectedImage retain];
        NSLog(@"Up IMG22 :: %@", uploadImg.image);
        NSLog(@"Sel IMG22 :: %@", selectedImage);

    }
}


+(UIImage *) loadImageFromAssertByUrl:(NSURL *)url completion:(void (^)(UIImage*)) completion{


    __block UIImage* img;

    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];
        img = [UIImage imageWithData:data];
        completion(img);
        NSLog(@"img ::: %@", img);
    } failureBlock:^(NSError *err) {
        NSLog(@"Error: %@",[err localizedDescription]);
    }];

    return img;
}

I had same issue in iPad air and iOS 8, and I solved my problem this codes. Thanks. — dobiho, Oct 21 '14 at 12:03

score -1 · Answer 8 · answered Jun 16 '14 at 09:36

Following Steps needs to be followed:
1) Make UIActionSheet
2) On selection necessary source type - load resrouces
3) didFinishPickingMediaWithInfo - set image from image Dictionary recieved

    - (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;

    }

didFinishPickingMediaWithInfo return nil photo

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