Creating an image format with an unknown type is an error Objective-C Xcode 8

Question

While choosing an image from the image picker in iOS 10 Objective-C and Xcode 8. I am getting an error -

Creating an image format with an unknown type is an error

.

It was ok for the previous version.

Here is my code:

UIImagePickerController* imgPicker=[[UIImagePickerController alloc] init];
imgPicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imgPicker.delegate = self;
[self presentViewController:imgPicker animated:YES completion:nil];

and the delegate method to recive the image is..

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
       [picker dismissViewControllerAnimated:YES completion:NULL];
       UIImage *myImage = [info objectForKey:UIImagePickerControllerOriginalImage];
}

I also tried other delegate function..

 -(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
}

but error not going.

I am not sure is it the bug of Xcode 8?
If any one faced the issue and solved please help to fix it.

its a swift version. also i worked with new delegate method.but not working. — riaz hasan
– riaz hasan, Commented Oct 17, 2016 at 12:43

matt · Accepted Answer · 2016-12-27 17:18:27Z

34

It's a bug. It's just a false warning. No bad thing is happening to the working of the app, so ignore the warning.

answered Dec 27, 2016 at 17:18

matt

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3 Comments

Bogdan Bogdanov Over a year ago

there is a problem, when I'm picking the IMAGE and then let imageData = UIImageJPEGRepresentation(theImage, 1) to send it via POST HTML I'm receiving this error and the image is not uploaded

matt Over a year ago

@BogdanBogdanov But that has nothing to do with the warning. If you have a question about whatever it is you're trying to do, ask it as a question so you can show your code and we can help.

matt Over a year ago

Hi @Chisx I've never seen this warning actually halt the program, sorry.

Dharmesh Mansata · Accepted Answer · 2017-02-21 08:04:11Z

4

i go through apple document and use this

UIImage *chosenImage = info[UIImagePickerControllerOriginalImage];

in didFinishPickingMediaWithInfo method.

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

UIImage *chosenImage = info[UIImagePickerControllerOriginalImage];  
imageViewPreview.image = chosenImage;  

[picker dismissViewControllerAnimated:YES completion:NULL];     

}

hope this help!

answered Feb 21, 2017 at 8:04

Dharmesh Mansata

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Comments

Dharmesh Mansata · Accepted Answer · 2017-12-19 13:07:30Z

1

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
  UIImage *tempImage = [info objectForKey:UIImagePickerControllerEditedImage];
  UIGraphicsBeginImageContext(tempImage.size);
  [tempImage drawInRect:CGRectMake(0, 0, tempImage.size.width, tempImage.size.height)];
  UIImage *image = [UIImage imageWithCGImage:[UIGraphicsGetImageFromCurrentImageContext() CGImage]];

  [self.myimageview setImage:image];
  UIGraphicsEndImageContext();
  [picker dismissViewControllerAnimated:YES completion:nil];
}

edited Dec 19, 2017 at 13:07

Dharmesh Mansata

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answered May 11, 2017 at 0:17

netcanis

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1 Comment

Donald Duck is with Ukraine Over a year ago

While this code may answer the question, providing additional context regarding how and/or why it solves the problem would improve the answer's long-term value.

Keesara Sriramreddy · Accepted Answer · 2016-12-27 16:57:47Z

-1

Update the UIImagePickerControllerDelegate method to the new method

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info

FROM THE PREVIOUS METHOD:

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

This fixed the issue for me. IDE Version: Xcode8.2.1

answered Dec 27, 2016 at 16:57

Keesara Sriramreddy

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1 Comment

matt Over a year ago

The warning is generated before the UIImagePickerControllerDelegate method is called. Therefore the exact signature of the method has nothing to do with the matter.

NSNoob · Accepted Answer · 2016-10-18 10:29:50Z

-2

Add this.

imgPicker.allowsEditing = YES;

edited Oct 18, 2016 at 10:29

NSNoob

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answered Oct 18, 2016 at 10:15

Jr2000

1

1 Comment

Jr2000 Over a year ago

plist add privacy-photo Library usage description.

ArtStyle · Accepted Answer · 2016-10-21 13:32:23Z

-4

I solved this problem by adding following initialisation of BitmapInfo parameter which used in CGContextRef context variable:

CGBitmapInfo bitmapInfo = kCGImageAlphaNoneSkipLast;

instead of CGBitmapInfo bitmapInfo = CGImageGetBitmapInfo(imageRef);

P.S:

So now my CGContextRef context looks as following

CGContextRef context = CGBitmapContextCreate(NULL,
        imageSize.width,
        imageSize.height,
        CGImageGetBitsPerComponent(imageRef),
        0,
        colorSpace,
        bitmapInfo);
CGColorSpaceRelease(colorSpace);

answered Oct 21, 2016 at 13:32

ArtStyle

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1 Comment

riaz hasan Over a year ago

Can you please explain it how it work with my question?

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