Sorting Alphabetically 2

// ...

#pragma mark - Utilities

- (NSArray *)mediaFromResponse:(NSDictionary *)response
{
    NSMutableArray * mediaObjects = [NSMutableArray array];
    
    // Convert dictionaries into instances of the MediaObject class
    
    NSArray *data = [response valueForKey:@"data"];
    if (data && (NSNull *)data != [NSNull null]) {
        for (NSDictionary *mediaDictionary in data) {
            MediaObject *mediaObject = [[MediaObject alloc] initWithDictionary:mediaDictionary];
            [mediaObjects addObject:mediaObject];
        }
    }
    
    // Sort mediaObjects alphabetically by username
    
    NSSortDescriptor * descriptor = [[NSSortDescriptor alloc] initWithKey:@"username" ascending:YES];
    NSArray * descriptors = @[descriptor];
    NSArray * sortedArray = [mediaObjects sortedArrayUsingDescriptors:descriptors];

    return sortedArray;
}

@end