image name is null in UIImage in objective-c

Question

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
     [picker dismissViewControllerAnimated:YES completion:nil];
     UIImage *image =[[UIImage alloc] init];
     image =[info objectForKey:@"UIImagePickerControllerOriginalImage"];
     NSURL *imagePath = [info objectForKey:@"UIImagePickerControllerReferenceURL"];
     imageName = [imagePath lastPathComponent];
     NSData *imageData;
     NSString *extensionOFImage =[imageName substringFromIndex:[imageName rangeOfString:@"."].location+1 ];

     if ([extensionOFImage isEqualToString:@"jpg"])
     {
          imageData = UIImagePNGRepresentation(image);
     }
     else
     {
          imageData = UIImageJPEGRepresentation(image, 1.0);
     }

     int imageSize=imageData.length/1024;
     NSLog(@"imageSize--->%d", imageSize);
     if (imageName!=nil) {
         NSLog(@"imageName--->%@",imageName);
     }
     else
     {
         NSLog(@"no image name found");
     }
     //commented ashok
     NSURL *resourceURL = [info objectForKey:UIImagePickerControllerMediaURL];
     resourceURL = [info objectForKey:UIImagePickerControllerReferenceURL];
     ALAssetsLibrary *assetLibrary = [ALAssetsLibrary new];
     [assetLibrary assetForURL:resourceURL
                  resultBlock:^(ALAsset *asset) {
           // get data
          ALAssetRepresentation *assetRep = [asset defaultRepresentation];
          CGImageRef cgImg = [assetRep fullResolutionImage];
          filename = [assetRep filename];
          NSLog(@"file name is:%@", filename);
     }
     failureBlock:^(NSError *error) {
          NSLog(@"%@", error);
     }];
}

-(void)send message
{
    NSLog(@"image name is:%@",filename);
      //image name is: IMG_0004.JPG       
    senderImgName=[UIImage imageNamed:filename];
    NSLog(@"sender image name is :%@",senderImgName);   
      //sender image name is: null
}

@BhavinRamani filename is string variable.. in filename having image name — satya, Jun 30 '16 at 06:30
@Desdenova actually i am picking image from photo gallery. so the image name should be passed here — satya, Jun 30 '16 at 06:31
That changes things. `[UIImage imageNamed:filename]` will look for the image in the bundle. So it's perfectly normal if it comes as nil. You need to use `+ imageWithContentsOfFile:` with the image path. — Desdenova, Jun 30 '16 at 06:34
this will help you - http://stackoverflow.com/questions/6674549/display-images-from-gallery-in-iphone — Rince Thomas, Jun 30 '16 at 06:36
@Desdenova thanks for your response.. will you give me any idea/// — satya, Jun 30 '16 at 06:36
if you are getting value in `cgImg`, then use `UIImage* image = [UIImage imageWithCGImage:cgImg];` Refer @Anessence answer — Rince Thomas, Jun 30 '16 at 06:58

Nirav D · Accepted Answer · 2016-06-30T06:42:25.560

2

You need to give the UIImage object to the imageView not the name when you are using UIImagePickerController, Change your code like this

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
     UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
     self.imageView.image = image
}

Hope this will help you.

edited Jun 30 '16 at 06:42

answered Jun 30 '16 at 06:35

Nirav D

71,513
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thanks for your response.. but i am using objective-c.. will you post objective-c code' – satya Jun 30 '16 at 06:37
@satya use my answer because singare has use deprecated method. – Nirav D Jun 30 '16 at 06:43
i am updating my query.. plz check it once – satya Jun 30 '16 at 06:46
What do you want to do? Adding only code does not help us. Please specify what do you want to do after picking image from `ImagePicker`. – Nirav D Jun 30 '16 at 07:05
after picking the image from image picker i want to send the image to server. – satya Jun 30 '16 at 07:17
Then you just need to convert your image in to data and encode it and send it the server. – Nirav D Jun 30 '16 at 07:21
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/116048/discussion-between-satya-and-nirav). – satya Jun 30 '16 at 07:24

score 2 · Answer 2 · edited Jul 01 '16 at 09:05

2

Try this

//This will show the picker
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
picker.delegate = self;
[self presentViewController:picker animated:YES completion:nil];
//Deprecated In IOS6[self presentModalViewController:picker animated:YES]; 
[picker release];

//This delegate method will give you the selected image.

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    imgProfilePic.image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [picker dismissModalViewControllerAnimated:YES];
}

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

edited Jul 01 '16 at 09:05

Meet Doshi

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answered Jun 30 '16 at 06:39

Rince Thomas

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this method is deprecated. – Nirav D Jun 30 '16 at 06:43
@Signare i am update my query.. will you plz check it once – satya Jun 30 '16 at 06:48
@Signare plz give me guidance.. i need your help – satya Jun 30 '16 at 06:50

score 1 · Answer 3 · answered Jun 30 '16 at 06:39

1

Check if you added your image to the project. If image exist in the project, check if it is included for using target in properties.

answered Jun 30 '16 at 06:39

John Snow

19
2

score 1 · Answer 4 · answered Jun 30 '16 at 06:53

1

Try this

ALAssetRepresentation *assetRep = [asset defaultRepresentation];
CGImageRef cgImg = [assetRep fullResolutionImage];
UIImage* image = [UIImage imageWithCGImage:cgImg];

answered Jun 30 '16 at 06:53

Anessence

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thanks for your response.. but i got error...will you give me some other ide – satya Jun 30 '16 at 07:37
can u come to chat room i want to discuss with you – satya Jun 30 '16 at 07:55

image name is null in UIImage in objective-c

4 Answers4