iOS实现类似微信小程序首页右滑关闭效果

在微信小程序首页，从最左边缘往右滑动，页面就会往下拉动，到达屏幕一半时，自动关闭页面。 直接上代码：

import UIKit

///导航控制器 MyNavVc.swift
public class MyNavVc: UINavigationController {

    public override func viewDidLoad() {
        super.viewDidLoad()
        
        let edgePanGesture = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(self.gest(sender:)))
        edgePanGesture.edges = .left
        self.view.addGestureRecognizer(edgePanGesture)
    }

    
    @objc private func gest(sender:UIScreenEdgePanGestureRecognizer){
        let point = sender.location(in: self.view)
        switch sender.state {
        case .changed:
            self.view.transform = CGAffineTransform(translationX: 0, y: point.x)
        case .cancelled,.ended,.failed:
            if(point.x >= self.view.bounds.height / 2){
                self.dismiss(animated: true, completion: nil)
            }else{
                self.view.transform = CGAffineTransform.identity
            }
        default:
            break
        }
    }
}

打开页面：

 @objc private func test(){
        let vc = MyNavVc(rootViewController: UIViewController())
        vc.modalPresentationStyle = .overFullScreen
        self.present(vc, animated: true, completion: nil)
    }

注意一点： vc.modalPresentationStyle = .overFullScreen 目的是让页面往下拉动，可以看到后面页面，就是页面穿透的效果。