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）
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