How to use NSURLConnection completionHandler with swift

block nsurlconnection swift
loopmasta picture loopmasta · Jun 3, 2014 · Viewed 23.5k times · Source

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.

let url:NSURL = NSURL(string:"some url")
let request:NSURLRequest = NSURLRequest(URL:url)
let queue:NSOperationQueue = NSOperationQueue()

NSURLConnection.sendAsynchronousRequest(request:request, queue:queue, completionHandler handler:((NSURLResponse!, NSData!, NSError!) -> Void)!)

Answer

Tomáš Linhart picture Tomáš Linhart · Jun 3, 2014

Like this:

NSURLConnection.sendAsynchronousRequest(request, queue: queue, completionHandler:{ response, data, error in /* Your code */ })

Or more verbose variant.

NSURLConnection.sendAsynchronousRequest(request, queue: queue, completionHandler:{ (response: NSURLResponse!, data: NSData!, error: NSError!) -> Void in
    /* Your code */
})

Related questions

jQuery CSS Opacity

What's wrong? I want to change the opacity if #nav .drop is display:block; jQuery(document).ready(function(){ if (jQuery('#nav .drop').css('display') === 'block') { jQuery('#main').css('opacity') = '0.6'; } });

Read More
Blocks and yields in Ruby

I am trying to understand blocks and yield and how they work in Ruby. How is yield used? Many of the Rails applications I've looked at use yield in a weird way. Can someone explain to me or show me …

Read More
is there a 'block until condition becomes true' function in java?

I'm writing a listener thread for a server, and at the moment I'm using: while (true){ try { if (condition){ //do something condition=false; } sleep(1000); } catch (InterruptedException ex){ Logger.getLogger(server.class.getName()).log(Level.SEVERE, null, ex); } } With the code …

Read More