downloading image

- (void)doThisTask {
// For this snippet we are downloading the same in two tasks.
NSString *imageUrl = @"http://www.something.com/pic.png";
// You always start by creating an NSURLConfiguration.
NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
// This creates a session using the current class as a delegate.
NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig
                                                      delegate:self
                                                 delegateQueue:nil];
//Tasks are always created by sessions. This one is created with the block-based method. Remember you could still use the NSURLSessionDownloadDelegate to track download progress.
NSURLSessionDownloadTask *getImageTask = [session downloadTaskWithURL:[NSURL URLWithString:imageUrl]
                                                    completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
// Here you use the location variable provided in the completion handler to get a pointer to the image
UIImage *downloadedImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:location]];
// Finally you could, for example, update UIImageView’s image to show the new file.
dispatch_async(dispatch_get_main_queue(), ^{
                   // do stuff with image
                   _imageWithBlock.image = downloadedImage;
               });
           }];

// You always have to start up the task!
[getImageTask resume];




}