images not showing after Xcode and iOS 9 update

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    self.selectedMessage = [self.messages objectAtIndex:indexPath.row];

    // mark message as read
    NSMutableArray *readByIds = [NSMutableArray arrayWithArray:[self.selectedMessage objectForKey:@"readBy"]];
    [readByIds addObject:[[PFUser currentUser] objectId]];
            [self.selectedMessage setObject:readByIds forKey:@"readBy"];
            [self.selectedMessage saveInBackground];


    NSString *fileType = [self.selectedMessage objectForKey:@"fileType"];
    if ([fileType isEqualToString:@"image"]) {
        // file type is image
        [self performSegueWithIdentifier:@"showImage" sender:self];
    } else {
        // file type is video
        PFFile *videoFile = [self.selectedMessage objectForKey:@"file"];
        NSURL *fileUrl = [NSURL URLWithString:videoFile.url];
        self.moviePlayer.contentURL = fileUrl;
        [self.moviePlayer prepareToPlay];
        [self.moviePlayer thumbnailImageAtTime:0 timeOption:MPMovieTimeOptionNearestKeyFrame];

        // add it to the view controller so we can see it
        [self.view addSubview:self.moviePlayer.view];
        [self.moviePlayer setFullscreen:YES animated:YES];
    }

}

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString *senderName = [self.message objectForKey:@"senderEmail"];
    self.navigationItem.title = senderName;

    // download image from Parse.com
    PFFile *imageFile = [self.message objectForKey:@"file"];
    NSURL *imageFileUrl = [[NSURL alloc] initWithString:imageFile.url];
    NSData *imageData = [NSData dataWithContentsOfURL:imageFileUrl];

    //set the image view to the message image
    self.imageView.image = [UIImage imageWithData:imageData];
}