Options_iOS/ViewController.swift at master · Kathiresan22/Options_iOS · GitHub

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//
//  ViewController.swift
//  HalfViewController
//
//  Created by Ventuno Technologies on 10/01/19.
//  Copyright © 2019 Ventuno Technologies. All rights reserved.
//

import UIKit


final class ViewControllerB: UIViewController {


    @IBOutlet weak var settingsStack: UIStackView!

    lazy var backdropView: UIView = {
        let bdView = UIView(frame: self.view.bounds)
        bdView.backgroundColor = UIColor.black.withAlphaComponent(0.5)
        return bdView
    }()

    let menuView = UIView()
    let menuHeight = UIScreen.main.bounds.height / 2
    var isPresenting = false


    override func viewDidLoad() {
        super.viewDidLoad()

        //settingsStack.isHidden = true;

        view.backgroundColor = .clear
        view.addSubview(backdropView)
        view.addSubview(menuView)

        menuView.backgroundColor = .red
        menuView.translatesAutoresizingMaskIntoConstraints = false
        menuView.heightAnchor.constraint(equalToConstant: menuHeight).isActive = true
        menuView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
        menuView.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        menuView.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
        //menuView.addSubview(settingsStack)

        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewControllerB.handleTap(_:)))
        backdropView.addGestureRecognizer(tapGesture)


    }


    @objc func handleTap(_ sender: UITapGestureRecognizer) {
        dismiss(animated: true, completion: nil)
    }


    @IBAction func showAvailableQuality(_ sender: Any) {

    }


}

extension ViewControllerB: UIViewControllerTransitioningDelegate, UIViewControllerAnimatedTransitioning {
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }

    func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return 1
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        let containerView = transitionContext.containerView
        let toViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)
        guard let toVC = toViewController else { return }
        isPresenting = !isPresenting

        if isPresenting == true {
            containerView.addSubview(toVC.view)

            menuView.frame.origin.y += menuHeight
            backdropView.alpha = 0

            UIView.animate(withDuration: 0.4, delay: 0, options: [.curveEaseOut], animations: {
                self.menuView.frame.origin.y -= self.menuHeight
                self.backdropView.alpha = 1
            }, completion: { (finished) in
                transitionContext.completeTransition(true)
            })
        } else {
            UIView.animate(withDuration: 0.4, delay: 0, options: [.curveEaseOut], animations: {
                self.menuView.frame.origin.y += self.menuHeight
                self.backdropView.alpha = 0
            }, completion: { (finished) in
                transitionContext.completeTransition(true)
            })
        }
    }
}


class ViewController: UIViewController {


     @IBOutlet weak var settingsStack: UIStackView!

    @IBAction func halfViewController(_ sender: Any) {

        let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "popUpStack") as! ViewControllerB
        //let vc = ViewControllerB()
        vc.modalPresentationStyle = .custom
        present(vc, animated: true, completion: nil)
    }

}