Netease-Music-Demo/wyy/MyTabBarController.swift

//
//  MyTabBarController.swift
//  wyy
//
//  Created by 施书顺 on 2021/3/5.
//

import UIKit

class MyTabBarController: UITabBarController {
    
    let sideBar = SideBarView()
    var sideBarWidth: CGFloat = 0

    override func viewDidLoad() {
        super.viewDidLoad()
        print(view.subviews)
        addChildViewControllers()
        tabBar.barTintColor = UIColor.white
        tabBar.isTranslucent = false
        
        view.addSubview(sideBar)
        sideBar.layoutIfNeeded()
        sideBar.snp.makeConstraints{ make in
            make.left.equalTo(-sideBar.frame.width)
        }
    }
    
    func addChildViewControllers(){
        setChildViewController(DiscoverViewController(), title: "发现", imageName: "discover", tag: 0)
        
        setChildViewController(PodCastViewController(), title: "博客", imageName: "podcast", tag: 1)
        setChildViewController(MineViewController(), title: "我的", imageName: "mine", tag: 2)
        setChildViewController(KaraokeViewController(), title: "K歌", imageName: "karaoke", tag: 3)
        setChildViewController(CommunityViewController(), title: "云村", imageName: "community", tag: 4)
    }
    
    
    func setChildViewController(_ childController: UIViewController, title: String, imageName: String, tag: Int) {
        let image = UIImage(named: imageName)?.withRenderingMode(.alwaysOriginal)
        childController.tabBarItem = UITabBarItem(title: title, image: image, tag: tag)
//        childController.tabBarItem.imageInsets = UIEdgeInsets(top: 6, left: 0, bottom: 0, right: 0)
        childController.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .play, target: self, action: #selector(openSideBar))
        let navVc = UINavigationController(rootViewController: childController)
        addChild(navVc)
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        let touch: UITouch? = touches.first
        guard let location = touch?.location(in: self.view) else { return }
        print(location)
        if !sideBar.frame.contains(location) {
            closeSideBar()
        } else {
            super.touchesBegan(touches, with: event)
        }
    }
    
    @objc func openSideBar(){
        UIView.animate(withDuration: 0.5, animations: {
            self.sideBar.frame = CGRect(x: 150, y: self.sideBar.frame.origin.y, width: self.sideBar.frame.width, height: self.sideBar.frame.height)
        }, completion: { ok in
            self.selectedViewController?.view.isUserInteractionEnabled = false
            self.tabBar.items?.forEach{$0.isEnabled = false}
        })
    }
    
    func closeSideBar(){
        UIView.animate(withDuration: 0.5, animations: {
            self.sideBar.frame = CGRect(x: -150, y: self.sideBar.frame.origin.y, width: self.sideBar.frame.width, height: self.sideBar.frame.height)
        }, completion: { ok in
            self.selectedViewController?.view.isUserInteractionEnabled = true
            self.tabBar.items?.forEach{$0.isEnabled = true}
        })
    }

}