import UIKit

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)

        // Override point for customization after application launch.

        self.window!.backgroundColor = UIColor.whiteColor()

        self.window!.rootViewController = RootViewController();

        self.window!.makeKeyAndVisible()

        return true

    }

}

import UIKit

class RootViewController: UIViewController {

    override func viewDidLoad() {

        super.viewDidLoad()

        let imageView = UIImageView.init(frame: UIScreen.mainScreen().bounds);

        imageView.backgroundColor = UIColor.greenColor()

        self.view.addSubview(imageView)

        let url:NSURL = NSURL.init(string: "http://pic2.ooopic.com/11/86/60/84bOOOPIC13.jpg")!

        let data:NSData = NSData(contentsOfURL: url)!

        let image = UIImage(data: data)!

        imageView.image = image

     }

}