Perfect presentation animation of iOS Share Extensions's Navigation Controller

ShareNavigationController.swift

//
//  ShareNavigationController.swift
//
//  Created by Tualatrix Chou on 2018/04/13.
//  
//  Use as the root navigation controller

import UIKit

class ShareNavigationController: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

        self.view.transform = CGAffineTransform(translationX: 0, y: self.view.frame.size.height)

        UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions(rawValue: 7 << 16 | UIViewAnimationOptions.allowAnimatedContent.rawValue), animations: {
            self.view.transform = .identity
        }, completion: nil)
    }

}