Swift Playground using NSURLSession

NSURLSession_Example.swift

import Foundation
import XCPlayground

// Let asynchronous code run
XCPSetExecutionShouldContinueIndefinitely()

if let url = NSURL(string: "http://www.google.com/") {

    let session = NSURLSession.sharedSession()
    
    let task = session.dataTaskWithURL(url, completionHandler: { (data, response, error) -> Void in
        if error != nil {
            println("error: \(error.localizedDescription): \(error.userInfo)")
        }
        else if data != nil {
            if let str = NSString(data: data, encoding: NSUTF8StringEncoding) {
                println("Received data:\n\(str)")
            }
            else {
                println("unable to convert data to text")
            }
        }
    })

    task.resume()
}
else {
    println("Unable to create NSURL")
}

deprecated, should use XCPlaygroundPage.currentPage.needsIndefiniteExecution = true

Need to call XCPlaygroundPage.currentPage.finishExecution() when ready and execution has finished.

This one also : http://iosdevcenters.blogspot.com/2015/12/how-to-call-webservice-using.html

thank you @danielgalasko .