iOS error when using writeImageToSavedPhotosAlbum

Question

This is the error I get when I try and compile my project:

Undefined symbols for architecture armv7:
  "_writeImageToSavedPhotosAlbum", referenced from:
  -[AddNewPhotoViewController imagePickerController:didFinishPickingMediaWithInfo:] in AddNewPhotoViewController.o

I get the error when calling writeImageToSavedPhotosAlbum . I suspect the error is to do with not importing the necessary frameworks, but I don't know what to import.

Any help?

---

EDIT

Here's my writeImageToSavedPhotosAlbum code:

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    // Access the uncropped image from info dictionary
    UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

    [self dismissModalViewControllerAnimated:YES];

    [_CameraOutput setImage:image];

    writeImageToSavedPhotosAlbum(image, nil, @selector(image:didFinishSavingWithError:contextInfo:));
}

---

EDIT #2 I had included the following import in my .m file:

#import <AssetsLibrary/AssetsLibrary.h>

Answer 1

writeImageToSavedPhotosAlbum is a method of ALAssetsLibrary , you must do something like

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:your_completion_block];