Question

I am having an array that contains different urls, and a set of buttons, each link is assigned to each buttons. When clicking on a button, the content in the url which is assigned to that particular button will be downloaded. The user can click on multiple buttons at the same time so that multiple download can perform at the same time. And at the same time user should have the provision to navigate through another views, so that the downloading process should not lock the UI. Which would be the best and easiest way to implement this? Please share your ideas.
Thanks

Answer 1

Just fetch the data asynchronously:

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
[NSURLConnection sendAsynchronousRequest:request 
                                   queue:[NSOperationQueue mainQueue] 
                       completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
                           // The code here is executed when the response from the request comes back.
                           // The variable "data" will contain the response from the data.
                           // So you can do something like:
                           UIImage *anImage = [[UIImage alloc] initWithData:data]];
                       }];