ihealth_ios/Inhealth/IHPresentBottom.swift

//
//  IHPresentBottom.swift
//  Inhealth
//
//  Created by weclouds on 2020/1/7.
//  Copyright © 2020 weclouds. All rights reserved.
//

import UIKit

class IHPresentBottom: UIPresentationController {
    var controllerHeight : CGFloat? = 0
    
    lazy var backView: UIView = {
        let backView = UIView(frame: self.containerView!.bounds)
        backView.backgroundColor = UIColor.black.withAlphaComponent(0.4)
        let tap = UITapGestureRecognizer(target: self, action: #selector(onclick(_:)))
        tap.numberOfTapsRequired = 1
        tap.numberOfTouchesRequired = 1
        backView.addGestureRecognizer(tap)
        return backView
    }()
    
    override init(presentedViewController: UIViewController, presenting presentingViewController: UIViewController?) {
        super.init(presentedViewController: presentedViewController, presenting: presentingViewController)
        controllerHeight = presentedViewController.controllerHeight == 0 ? KSCREENHEIGHT : presentedViewController.controllerHeight
    
    }
    
    override func presentationTransitionWillBegin() {
        super.presentationTransitionWillBegin()
        self.backView.alpha = 0
        self.containerView?.addSubview(self.backView)
        UIView.animate(withDuration: 1.0) {
            self.backView.alpha = 1
        }
    }
    
    override func dismissalTransitionWillBegin() {
        super.dismissalTransitionWillBegin()
        UIView.animate(withDuration: 1.0) {
            self.backView.alpha = 0
        }
    }
    
    override func dismissalTransitionDidEnd(_ completed: Bool) {
        super.dismissalTransitionDidEnd(completed)
        if completed == true {
            self.backView.removeFromSuperview()
        }
    }
    
    
    override var frameOfPresentedViewInContainerView: CGRect{
        return CGRect(x: 0, y: KSCREENHEIGHT - controllerHeight!, width: KSCREENWIDTH, height: controllerHeight!)
    }
   @objc func onclick(_ gestureRecognzier:UIGestureRecognizer)  {
        let point = gestureRecognzier.location(in: self.backView)
      let frame = self.frameOfPresentedViewInContainerView
     if frame.contains(point) == false {
        self.presentedViewController .dismiss(animated: true, completion: nil)
    }
    }
}