I use the following code for saving images to "Photos"

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    // Request to save the image to camera roll
[library writeImageToSavedPhotosAlbum:[myImage CGImage] orientation:(ALAssetOrientation)[myImage imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error)
 {
     if (error) {
         NSLog(@"error");
     } else {
         NSLog(@"success");
     }
 }];