How to use NSURLConnection completionHandler with swift

Question

Does anybody know how handlers (blocks) work in swift? I am trying to get this code running but i can\'t find any documentation of the right syntax for the completionHandler

Answer 1

The right term you are looking for here is Closure. Closures in Swift are similar to blocks in C and Objective-C. In addition to Tomáš's answer there is another short version to use the completion handler here:

NSURLConnection.sendAsynchronousRequest(request, queue: queue, completionHandler: {$0; $1; $2})

Here I have used Shorthand Argument Names. I am accessing response as $0, data as $1 and error as $3. I find this syntax more easy to read and write unless the parameters are large in number otherwise the code will become unreadable.