Load Tableview Thumbs

tableview.m

//Taken from and used with:
// http://stackoverflow.com/questions/16663618/async-image-loading-from-url-inside-a-uitableview-cell-image-changes-to-wrong

////////////////////
//With SDWebImage //
////////////////////
(don't use the below method. This one is king.)

//Import the goods and use PODS
// pod 'SDWebImage', '~> 3.7'
//
#import <SDWebImage/UIImageView+WebCache.h>
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//Custom tableViewCell
    static NSString *CellIdentifier = @"VideoCell";
    VideoCell *cell = (VideoCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
    if (cell == nil)
    {
        cell = [[VideoCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
    
    VideoObject *video = [VideoObject new];
    video = [self.safetyVideos objectAtIndex:indexPath.row];
    cell.titleLabel.text = video.videoTitle;
    cell.videoURL = video.videoURL;
    
    NSArray *components = [cell.videoURL componentsSeparatedByString:@"v="];
    if ([components count] != 0) {
        cell.videoIdentifier = components[1];
    }
    
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_async(queue, ^{
        XCDYouTubeClient *client = [XCDYouTubeClient new];
        [client getVideoWithIdentifier:cell.videoIdentifier completionHandler:^(XCDYouTubeVideo * _Nullable video, NSError * _Nullable error) {
            
            //This is the money shot right here
            [cell.thumbImageView sd_setImageWithURL:video.smallThumbnailURL placeholderImage:[UIImage imageNamed:@"youtube"]];

        }];
     });
    
    return cell;
}

//////////////////////
//Without SDWebImage//
//////////////////////
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    //Using custom cell class myCell which has a UIImage thumbnail
    myCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    if (cell == nil) {
        cell = [[myCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];
    }

    cell.thumbnail.image = nil; // or cell.poster.image = [UIImage imageNamed:@"placeholder.png"];
    
    //GDC queue
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_async(kBgQueue, ^{
        NSData *imgData = [NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://myurl.com/%@.jpg"]]];
        if (imgData) {
        
            UIImage *image = [UIImage imageWithData:imgData];
            
            if (image) {
                dispatch_async(dispatch_get_main_queue(), ^{
                    myCell *updateCell = (id)[tableView cellForRowAtIndexPath:indexPath];
                    if (updateCell)
                        updateCell.thumbnail.image = image;
                });
            }
        }
    });
    return cell;
}


//Other example using YouTube API for grabbing thumbs
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //Custom VideoCell class
    static NSString *CellIdentifier = @"VideoCell";
    VideoCell *cell = (VideoCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
    if (cell == nil)
    {
        cell = [[VideoCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
    
    //VideoObject holds videoTitle, videoURL
    VideoObject *video = [VideoObject new];
    video = [self.safetyVideos objectAtIndex:indexPath.row]; //Array of videos already loaded
    cell.titleLabel.text = video.videoTitle;
    cell.videoURL = video.videoURL;
    
    //Grabbing the ID of the video from the URL
    NSArray *components = [cell.videoURL componentsSeparatedByString:@"v="];
    if ([components count] != 0) {
        cell.videoIdentifier = components[1];
    }
    
    //Setting placeholder image
    [cell.thumbImageView setImage:[UIImage imageNamed:@"youtube"]];
    
    //GDC queue
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_async(queue, ^{
        XCDYouTubeClient *client = [XCDYouTubeClient new];
        [client getVideoWithIdentifier:cell.videoIdentifier completionHandler:^(XCDYouTubeVideo * _Nullable video, NSError * _Nullable error) {
            
            //Setting everything up like in the above example
            NSData *data = [NSData dataWithContentsOfURL:video.smallThumbnailURL]; //YouTube API has thumbs/image/etc for XCDYouTubeVideo objects
            
            if (data) {
                UIImage *image = [UIImage imageWithData:data];
                
                if (image) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        VideoCell *updateCell = (id)[tableView cellForRowAtIndexPath:indexPath];
                        if (updateCell)
                            updateCell.thumbImageView.image = image;
                    });
                }
            }
        }];
     });
    
    return cell;
}