Loading image from URL swift

set-image.swift

@IBOutlet weak var imageView: UIImageView!

func setImageToImageView() {
    fetchImage { (imageData) in
        if let data = imageData {
            // referenced imageView from main thread
            // as iOS SDK warns not to use images from
            // a background thread
            DispatchQueue.main.async {
                self.imageView.image = UIImage(data: data)
            }
        } else {
		        // show as an alert if you want to
            print("Error loading image");
        }
    }
}