How To Downloading Image from server URL on Swift 4?

Downloading Image from server URL

This tutorial to download image from server using the URLSession. Here create extension of download image. And after successfully response load the image in imageView.

extension on UIImageView to download image:

1234567891011121314151617181920extension UIImageView {
    func dowloadFromServer(url: URL, contentMode mode: UIViewContentMode = .scaleAspectFit) {
        contentMode = mode
        URLSession.shared.dataTask(with: url) { data, response, error in
            guard
                let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
                let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
                let data = data, error == nil,
                let image = UIImage(data: data)
                else { return }

            DispatchQueue.main.async() {
                self.image = image
            }
            }.resume()
    }
    func dowloadFromServer(link: String, contentMode mode: UIViewContentMode = .scaleAspectFit) {
        guard let url = URL(string: link) else { return }
        dowloadFromServer(url: url, contentMode: mode)
    }
}

Set downloaded image in UIImageView 

123456789override func viewDidLoad() {
    super.viewDidLoad()

    let imageV = UIImageView(frame: CGRect(x: 90, y: 200, width: 200, height: 200))
    imageV.layer.borderWidth = 5
    imageV.layer.borderColor = UIColor.red.cgColor
    imageV.dowloadFromServer(link: "https://yt3.ggpht.com/a-/ACSszfFprNp-1Ay1IhDjH4NenwvLItZpPHeJdewulw=s900-mo-c-c0xffffffff-rj-k-no", contentMode: .scaleAspectFill)
    self.view.addSubview(imageV)

}

Thanks.