1.首先创建swift工程，创建RootViewController继承于UITabBarController

2.创建BaseViewController继承于UIViewController，初始化导航栏

如下所示：

创建几个自己需要的VC，分别继承于BaseViewController

然后再rootviewcontroller中初始化tabbar有关的信息

    var communityNav: UINavigationController!

    var storeNav: UINavigationController!

    var shoppingMallNav: UINavigationController!

    var mineNav: UINavigationController!

小编创建的CommunityViewController  StoreViewController   ShoppingMallViewController  MineViewController以这几个为例。

废话不多说，直接上代码：

在viewdidload中

communityNav = UINavigationController (rootViewController: CommunityViewController ())

        communityNav.tabBarItem.title = "社区"

        communityNav.tabBarItem.image = UIImage (named: "tab_community_icon_nor")?.withRenderingMode(.alwaysOriginal)

        communityNav.tabBarItem.selectedImage = UIImage (named: "tab_community_icon_pre")?.withRenderingMode(.alwaysOriginal)

        communityNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.red, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .normal)

        communityNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.yellow, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .selected)

        storeNav = UINavigationController (rootViewController: StoreViewController ())

        storeNav.tabBarItem.title = "门店"

        storeNav.tabBarItem.image = UIImage (named: "tab_store_icon_nor")?.withRenderingMode(.alwaysOriginal)

        storeNav.tabBarItem.selectedImage = UIImage (named: "tab_store_icon_pre")?.withRenderingMode(.alwaysOriginal)

        storeNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.red, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .normal)

        storeNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.yellow, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .selected)

        shoppingMallNav = UINavigationController (rootViewController: ShoppingMallViewController ())

        shoppingMallNav.tabBarItem.title = "商城"

        shoppingMallNav.tabBarItem.image = UIImage (named: "tab_mall_icon_nor")?.withRenderingMode(.alwaysOriginal)

        shoppingMallNav.tabBarItem.selectedImage = UIImage (named: "tab_mall_icon_pre")?.withRenderingMode(.alwaysOriginal)

        shoppingMallNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.red, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .normal)

        shoppingMallNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.yellow, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .selected)

        mineNav = UINavigationController (rootViewController: MineViewController ())

        mineNav.tabBarItem.title = "我的"

        mineNav.tabBarItem.image = UIImage (named: "tab_user_icon_nor")?.withRenderingMode(.alwaysOriginal)

        mineNav.tabBarItem.selectedImage = UIImage (named: "tab_user_icon_pre")?.withRenderingMode(.alwaysOriginal)

        mineNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.red, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .normal)

        mineNav.tabBarItem.setTitleTextAttributes([NSAttributedStringKey.foregroundColor : UIColor.yellow, NSAttributedStringKey.font : UIFont.systemFont(ofSize: 11)], for: .selected)

        viewControllers = [communityNav, storeNav, shoppingMallNav, mineNav]

附图一张

在appdelegate中把rootviewcontroller指定为 window?.rootViewController 的rootviewctroller  即：

window?.rootViewController = RootViewController()   大功告成，谢谢支持！！（小编也新手，大家多多指点）