Download Images Asynchronously

Hi this is a simple code that used to download images from url in background.

  

    

    dispatch_queue_t imageLoadQueue = dispatch_queue_create("com.gmm.test",NULL);

    

    dispatch_async(imageLoadQueue, ^{

//Wait for 5 seconds...

        usleep(1000000);

        docPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

        

        

        for(int k=0; k <[allImage count] ;k++){

            

           

            imgURL = [allImage objectAtIndex:k];

            [imagePreview addObject:imgURL];

            imgData=[NSData dataWithContentsOfURL:[NSURL URLWithString:imgURL]];

           

            

            [imgData writeToFile:[NSString stringWithFormat:@"%@/%@", docPath, [imgURL lastPathComponent]] atomically:YES];

            

            

        }

//reload ur viewcontroller or tableview or collectionview  if necessary           

        

     

    });