Loading takes a while when i set UIImage to a NSData with a url.

Question

NSData *imageUrl = [NSData dataWithContentsOfURL:[NSURL URLWithString:[[self.content objectAtIndex:indexPath.row] valueForKey:@\"imageUrl\"] ]];
cell.thumbnailImageV         


        

Answer 1

Use an NSOperationQueue so that you can perform the loading of the data on a background thread. After that you should set the image on the main queue.

// Assume queue is created
[queue addOperationWithBlock:^{
    NSData *imageUrl = [NSData dataWithContentsOfURL:[NSURL URLWithString:[[self.content objectAtIndex:indexPath.row] valueForKey:@"imageUrl"] ]];

    [[NSOperationQueue mainQueue] addOperationWithBlock:^{
        cell.thumbnailImageView.image=[UIImage imageWithData:imageUrl];
    }];
}];

For more about NSOperationQueue see the docs about NSOperationQueue.