GetAlbumsFromIphone.m

 NSMutableArray* groups;
 
 ALAssetsLibraryGroupsEnumerationResultsBlock listGroupBlock = ^(ALAssetsGroup *group, BOOL* stop){
        if(group){
            [groups addObject:group];
        }else{
            [self.tableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:NO];
        }
    };
    
    ALAssetsLibraryAccessFailureBlock failureBlock = ^(NSError *error){
        NSError* errorMessage = nil;
        switch ([error code]) {
            case ALAssetsLibraryAccessUserDeniedError:
            case ALAssetsLibraryAccessGloballyDeniedError:
                errorMessage = @"The user has declined access to it";
                break;
                
            default:
                errorMessage = @"Unknown Error";
                break;
        }
    };
    NSUInteger groupTypes = ALAssetsGroupAlbum | ALAssetsGroupEvent | ALAssetsGroupFaces | ALAssetsGroupSavedPhotos;
    [assertLibrary enumerateGroupsWithTypes:groupTypes usingBlock:listGroupBlock failureBlock:failureBlock];

Enumerate all albums from iphones
e.g. Camera Rolling:
ALAssetsGroupSavedPhotos

NSUInteger groupTypes = ALAssetsGroupAlbum | ALAssetsGroupEvent | ALAssetsGroupFaces | ALAssetsGroupSavedPhotos;