Adding an image to a UIAlertController

If you're willing to use private APIs you could use the private attributedMessage property to set an attributed string as message containing an image:

Source: https://github.com/JaviSoto/iOS10-Runtime-Headers/blob/master/Frameworks/UIKit.framework/UIAlertController.h

let actionSheet = UIAlertController(title: "title", message: nil, preferredStyle: .actionSheet)

let str = NSMutableAttributedString(string: "Message\n\n", attributes: [NSAttributedStringKey.font: UIFont.preferredFont(forTextStyle: .caption1), NSAttributedStringKey.foregroundColor: UIColor.gray])

let attachment = NSTextAttachment()

attachment.image = --> yourImage <--

str.append(NSAttributedString(attachment: attachment))

actionSheet.setValue(str, forKey: "_attributedMessage")

Again, this is a private API and therefore could change in any release without notice. To be used with caution!

    let alertMessage = UIAlertController(title: "My Title", message: "", preferredStyle: .alert)
    let action = UIAlertAction(title: "OK", style: .default, handler: nil)
    action.setValue(UIImage(named: "task1.png")?.withRenderingMode(UIImageRenderingMode.alwaysOriginal), forKey: "image")
    alertMessage .addAction(action)
    self.present(alertMessage, animated: true, completion: nil)

Swift 3

You can do like this.

    let imageView = UIImageView(frame: CGRectMake(220, 10, 40, 40))
   // imageView.image = UIImage(named: "ic_no_data")
    let alertMessage = UIAlertController(title: "My Title", message: "", preferredStyle: .Alert)

    let image = UIImage(named: "Image")
    let action = UIAlertAction(title: "OK", style: .Default, handler: nil)
    action.setValue(image, forKey: "image")
    alertMessage .addAction(action)

    self.presentViewController(alertMessage, animated: true, completion: nil)
    alertMessage.view.addSubview(imageView)

You can add a UIImageView as a subview to your UIAlertController.

var imageView = UIImageView(frame: CGRectMake(220, 10, 40, 40))
imageView.image = yourImage
alert.view.addSubview(imageView)

This is how you do in UIAlertController:

let alertMessage = UIAlertController(title: "My Title", message: "My Message", preferredStyle: .Alert)

let image = UIImage(named: "myImage")
var action = UIAlertAction(title: "OK", style: .Default, handler: nil)
action.setValue(image, forKey: "image")
alertMessage .addAction(action)

self.presentViewController(alertMessage, animated: true, completion: nil)