Swift-自定义TabBar

1.TabBarView

class XTKMainTabBarController: UITabBarController {

    var senderBtn = MainTabBtn()//选中的分类按钮
    var buttonsArray = [UIButton]()//按钮数组
    var namesArray = [[String: String]]()
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.brown
        
        // 1. 加载配置数据
        namesData()
        //2.初始化子试图控制器
        setupSubControllers()
        //3.添加分类按钮
        addItems()
        
    }
    
    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        
        var tabFrame = tabBar.frame
        tabFrame.size.height = kTabBarHeight
        tabFrame.origin.y = self.view.frame.size.height - kTabBarHeight
        self.tabBar.frame = tabFrame
    }
    
    
    //MARK: 懒加载
    //主视图
    private lazy var mainView : UIView = {
        
        let mainView = UIView(frame: CGRect(x: 0, y: 0, width: KSCREEN_WIDTH, height: kTabBarHeight))
        
        let lineView = UIView(frame: CGRect(x: 0, y: 0, width: KSCREEN_WIDTH, height: 1))
        mainView.backgroundColor = UIColor.brown
        
        mainView.addSubview(lineView)
        return mainView
    }()
    
}



extension XTKMainTabBarController {
    
    private func namesData() {
        namesArray = [
            ["title" : "首页", "normalImage" : "tabbarNew_0", "selectedImage" : "tabbarNew_0"],
            ["title" : "首页1", "normalImage" : "tabbarNew_1", "selectedImage" : "tabbarNew_1"],
            ["title" : "首页2", "normalImage" : "tabbarNew_2", "selectedImage" : "tabbarNew_2"],
            ["title" : "首页3", "normalImage" : "tabbarNew_3", "selectedImage" : "tabbarNew_3"],
            ["title" : "首页4", "normalImage" : "tabbarNew_4", "selectedImage" : "tabbarNew_4"],
        ]//子视图属性数组
    }
    
    //MARK: 初始化子试图控制器
    private func setupSubControllers() {
        
        var controllers = [UIViewController]()
        
        let nav0 = XTKNavigationController(rootViewController: XTKHomeVC.init())
        let nav1 = XTKNavigationController(rootViewController: XTKQuoteVC.init())
        let nav2 = XTKNavigationController(rootViewController: XTKTradeVC.init())
        let nav3 = XTKNavigationController(rootViewController: XTKContractVC.init())
        let nav4 = XTKNavigationController(rootViewController: XTKAssetsHomeVC.init())
        
        controllers.append(nav0)
        controllers.append(nav1)
        controllers.append(nav2)
        controllers.append(nav3)
        controllers.append(nav4)
        
        viewControllers = controllers
    }
    
    //MARK: 添加分类按钮
    private func addItems() {
        
        // 1. 创建版视图
        self.tabBar.backgroundColor = UIColor.clear
        self.tabBar.addSubview(mainView)
        
        // 2. 创建分类按钮
        buttonsArray = [UIButton]()
        let kBtnW = KSCREEN_WIDTH/CGFloat(namesArray.count)
        
        for index in 0..

2.UIButton

class MainTabBtn: UIButton {

    let kImageWith: CGFloat = 24
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        titleLabel?.textAlignment = NSTextAlignment.center
        titleLabel?.font = UIFont.systemFont(ofSize: 12)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        imageView?.frame = CGRect(x: (self.frame.size.width - kImageWith)*0.5, y: 7, width: kImageWith, height: kImageWith)
        titleLabel?.frame = CGRect(x: 0, y: imageView?.frame.maxY ?? 0, width: self.frame.size.width, height: self.frame.size.height - (imageView?.frame.maxY ?? 0))
    }

}

3.NavigationController

• 隐藏系统导航栏，准备自定义
• 处理导航跳转以及手势

class XTKNavigationController: UINavigationController, UIGestureRecognizerDelegate, UINavigationControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        // 隐藏系统导航栏
        navigationBar.isHidden = true
        
        // 1.如果是因为自定义导航按钮而导致手势返回失效，那么可以在NavigationController的viewDidLoad函数中添加如下代码：
        if ((interactivePopGestureRecognizer?.responds(to: Selector(("interactivePopGestureRecognizer")))) != nil){
            interactivePopGestureRecognizer?.delegate = self
            delegate = self
        }
    }

    
    //2.跳转自动显示和隐藏TabBar
    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        if children.count > 0 {
            tabBarController?.tabBar.isHidden = true
            viewController.hidesBottomBarWhenPushed = true
        }
        if ((interactivePopGestureRecognizer?.responds(to: Selector(("interactivePopGestureRecognizer")))) != nil) && animated == true {
            interactivePopGestureRecognizer?.isEnabled = false;
        }
        super.pushViewController(viewController, animated: animated)
    }
    
    
    //3.返回手势
    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        if (gestureRecognizer == self.interactivePopGestureRecognizer) {
            if (viewControllers.count < 2 || self.visibleViewController == self.viewControllers[0]) {
                return false;
            }
        }
        return true;
    }
    
    
    //4.这个代理方法的功能是哪个控制器进行展示了，也就是栈顶控制器
    func navigationController(_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
        if ((interactivePopGestureRecognizer?.responds(to: Selector(("interactivePopGestureRecognizer")))) != nil) {
            interactivePopGestureRecognizer?.isEnabled = true;
        }
    }
    
    
    //5.这个方法看名称可以知道也是出栈，但是他出的非常彻底，直接回到了栈底，把栈里的子控制器都出栈了
    override func popToRootViewController(animated: Bool) -> [UIViewController]? {
        if ((interactivePopGestureRecognizer?.responds(to: Selector(("interactivePopGestureRecognizer")))) != nil) && animated == true {
            interactivePopGestureRecognizer?.isEnabled = false;
        }
        return super.popToRootViewController(animated: animated)
    }
    
    
    //6.这个方法看多了个参数，也就说可以出栈到指定的控制器那个位置，就是指定的控制器之前的子控制器都得出栈。
    override func popToViewController(_ viewController: UIViewController, animated: Bool) -> [UIViewController]? {
        if ((interactivePopGestureRecognizer?.responds(to: Selector(("interactivePopGestureRecognizer")))) != nil) && animated == true {
            interactivePopGestureRecognizer?.isEnabled = false;
        }
        return super.popToViewController(viewController, animated: animated)
    }
    
}