AFNetworking Image Downloads with Download Progress Block

gistfile1.m

- (void)downloadMultiAFN {
    // Basic Activity Indicator to indicate download
    UIActivityIndicatorView *loading = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    [loading startAnimating];
    [self.imageView.superview addSubview:loading];
    loading.center = self.imageView.center;
    
    // Create a request from the url, make an AFImageRequestOperation initialized with that request
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:self.picUrl]];
    AFImageRequestOperation *op = [[AFImageRequestOperation alloc] initWithRequest:request];
    
    // Set a download progress block for the operation
    [op setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
        if ([op.request.URL.absoluteString isEqualToString:@"http://www.pleiade.org/images/hubble-m45_large.jpg"]) {
            self.progressBar.progress = (float) totalBytesRead/totalBytesExpectedToRead;
        } else self.progressBar2.progress = (float) totalBytesRead/totalBytesExpectedToRead;
    }];
    
    // Set a completion block for the operation
    [op setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        self.imageView.image = responseObject;
        self.image = responseObject;
        if ([op.request.URL.absoluteString isEqualToString:@"http://www.pleiade.org/images/hubble-m45_large.jpg"]) {
            self.progressBar.progress = 0;
        } else self.progressBar2.progress = 0;
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {}];

    // Start the image download operation
    [op start];
    
    // Remove the activity indicator
    [loading stopAnimating];
    [loading removeFromSuperview];
}