How to send POST parameters in Swift?

Question

Here some code:

var URL: NSURL = NSURL(string: "http://stackoverflow.com")
var request:NSMutableURLRequest = NSMutableURLRequest(URL:URL)
request.HTTPMethod = "POST"
request.HTTPBody = ?????? 
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) 
{
    (response, data, error) in
    println(NSString(data: data, encoding: NSUTF8StringEncoding))
}

What should I write in request.HTTPBody if I want send POST query "key" = "value" ?

Answer 1

No different than in Objective-C, HTTPBody expects an NSData object:

var bodyData = "key1=value&key2=value&key3=value" request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding); 

You'll have to setup the values & keys yourself in the string.

Answer 2

Update to Swift 4.2

This code is based on pixel's answer, and is meant as an update for Swift 4.2

let bodyData = "key1=value&key2=value&key3=value"
request.httpBody = bodyData.data(using: .utf8)