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

I would suggest you to use AsyncImageView a beautiful implementation by Nicklockwood -father of iCarousel.

Link it is very simple to use.

    #import "AsyncImageView.h"

and in all imageViews do this.

    [imageView setImage:@"default.png"];
    [imageView setImageURL:@"whateverurl/whateverimage.png"];

In your case it would be:

    [cell.thumbnailImageView setImageURL:@"yourURL"];

It works like a charm, and my code is in production. But if you still want your code to work try this:

 UIActivityIndicator *activity =[[UIActivityIndicator alloc] initWithStyle:UIActivityIndicatorWhite];
 [activity setFrame:CGRectMake(0,0,30,30)];
 [cell.contentView addSubview:activity];

 cell.thumbnailImageView.image=[UIImage imageNamed:@"Default~cell~image.png"];      

 dispatch_queue_t dispatchQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0);
 dispatch_async(dispatchQueue, ^(void)
 { 
   [activity startAnimating];
   [self loadImages];
   dispatch_sync(dispatch_get_main_queue(), ^{ 
           NSData *imageUrl = [NSData dataWithContentsOfURL:[NSURL URLWithString:[[self.content objectAtIndex:indexPath.row] valueForKey:@"imageUrl"] ]];
           cell.thumbnailImageView.image=[UIImage imageWithData:imageUrl];          [activity stopAnimating];
           [activty setHidden:YES];
    });
 });