Example custom animation PopUp ViewController with sending email

PopUpViewController.swift

//
//  PopUpViewController.swift
//
//  Created by Vasiliy Savchuk on 22.11.16.
//  Copyright © 2016 All rights reserved.
//
// Usage this snippet:
//    @IBAction func yourButtonDidPress(_ sender: Any) {
//        let popOverVC = UIStoryboard(name: Constants.Storyboard.Map, bundle: nil).instantiateViewController(withIdentifier: Constants.StoryboardID.PopUpViewController) as! PopUpViewController
//        popOverVC.pointModel = self.curentPoint
//        self.addChildViewController(popOverVC)
//        popOverVC.view.frame = self.view.frame
//        self.view.addSubview(popOverVC.view)
//        popOverVC.didMove(toParentViewController: self)
//    }

import UIKit
import MessageUI

class PopUpViewController: UIViewController {

    @IBOutlet weak var pinButton: UIButton!
  
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var recommendationTitle: UILabel!
    
    //MARK - Lifecicle Object
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = UIColor.black.withAlphaComponent(0.4)
        self.localizeUI()
        self.showAnimate()
    }

    //Methods
    
    func localizeUI() {
        self.titleLabel.text = NSLocalizedString("Recommendation", comment: "")
        self.pinButton.setTitle(NSLocalizedString("PIN", comment: ""), for: .normal)
    }
    
    //MARK: Actions
    
    @IBAction func closePopUp(_ sender: Any) {
        self.removeAnimate()
    }
    
    @IBAction func callButtonDidPress(_ sender: Any) {
        if UIDevice.current.model == "iPhone" {
            UIApplication.shared.openURL(URL(string: "tel:01800")!)
        } else {
            showAlert(title: "Margot", message: "Your device doesn't support this feature.")
        }
        
    }
    
    @IBAction func openMail(_ sender: Any) {
        
        if MFMailComposeViewController.canSendMail() {
            let mail = MFMailComposeViewController()
            mail.mailComposeDelegate = self
            mail.setToRecipients(["test@test.com"])
            mail.setSubject("Company")
            mail.setMessageBody("TEXT: TEST", isHTML: false)
            present(mail, animated: true, completion: nil)
        } else {
            showAlert(title: "Company", message: "Your device can't support email")
        }
        
    }
    
    //MARK: Methods
    
    func showAnimate()
    {
        self.view.transform = CGAffineTransform(scaleX: 1.3, y: 1.3)
        self.view.alpha = 0.0;
        UIView.animate(withDuration: 0.25, animations: {
            self.view.alpha = 1.0
            self.view.transform = CGAffineTransform(scaleX: 1.0, y: 1.0)
        });
    }
    
    func removeAnimate()
    {
        UIView.animate(withDuration: 0.25, animations: {
            self.view.transform = CGAffineTransform(scaleX: 1.3, y: 1.3)
            self.view.alpha = 0.0;
        }, completion:{(finished : Bool)  in
            if (finished)
            {
                self.view.removeFromSuperview()
            }
        });
     }
}

extension PopUpViewController: MFMailComposeViewControllerDelegate {
    
    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
        controller.dismiss(animated: true, completion: nil)
    }
}