How to retrieve images from server asynchronously

Question

i have one NSMutableArray with some image url\'s. The images have sizes between 12KB to 6MB. I use AsycImageView class and implement but when large

Answer 1

You could download image asynchronously using GCD. Use the following code,

__block NSData *imageData;

dispatch_queue_t myQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, NULL);
dispatch_async(myQueue, ^{
  //load url image into NSData
  imageData = [NSData dataWithContentsOfURL: your_image_URL];
  if(imageData) {
    dispatch_sync(dispatch_get_main_queue(), ^{
        //convert data into image after completion
        UIImage *img = [UIImage imageWithData:imageData];
        //do what you want to do with your image
    });
 } else {
      NSLog(@"image not found at %@", your_image_URL);
 }
});
dispatch_release(myQueue);

For further info, see dispatch_queue_t