Asynchronously Display an Web Image with NSURLSession.sharedSession().dataTaskWithURL

To display an image on the Internet in Swift 2.2 with Xcode 7.3 using asynchronous download method, modify ViewController.swift as:

import UIKit

class ViewController: UIViewController {

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        let url = NSURL(string: "https://....JPG")!

        

        let imageSize : CGFloat = 200

        let imageView = UIImageView(frame: CGRectMake(0, 0, imageSize, imageSize))

        imageView.center = view.center

        

        NSURLSession.sharedSession().dataTaskWithURL(url, completionHandler: { (data, response, error) in

            

            if let error = error {

                print("Image read error \(error)")

                return

            }

            

            imageView.image = UIImage(data: data!)

        }).resume()

        

        //Synchronous Method without using NSURLSession

        //imageView.image = UIImage(data: NSData(contentsOfURL: url!)!)

        

        //Scale the image with the original aspect ratio

        imageView.contentMode = UIViewContentMode.ScaleAspectFit

        

        view.addSubview(imageView)

    }

    

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

Related Information:

Open an internet image and create a button with underline title