Launch Activity View

import UIKit

class ViewController: UIViewController {

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

	@IBAction func experiment(){
		let image = UIImage()
		let controller = UIActivityViewController(activityItems: [image],
			applicationActivities: nil)
		self.presentViewController(controller, animated: true, completion:nil)
	}
}

@IBAction func experiment(_ sender: Any){
	let nextController = UIImagePickerController()
	self.present(nextController, animated: true, completion: nil)
}

@IBAction func experiment(_ sender: Any){

	let image = UIImage()
	let controller = UIActivityViewController(activityItems: [image],
		self.present(controller, animated: true, completation: nil))
}

import UIKit

class DiceViewController: UIViewController {

	var firstValue: Int?
	var secondValue: Int?

	@IBOutlet var firstDie: UIImageView!
	@IBOutlet var secondDie: UIImageView!

	override func viewWillAppear(animated: Bool){

		if let firstValue = self.firstValue {
			self.firstDie.image = UIImage(named: "d\(firstValue)")
		} else {
			self.firstDie.image = nil;
		}

		if let secondValue = self.secondValue {
			self.secondDie.image = UIImage(named: "d\(secondValue)")
		} else {
			self.secondDie.image = nil
		}

		self.firstDie.alpha = 0
		self.secondDie.alpha = 0
	}
}