TabBar - item

        v1.tabBarItem = UITabBarItem.init(title: "首页", image: UIImage(named: "shouye_nor")?.withRenderingMode(.alwaysOriginal), selectedImage: UIImage(named: "shouye_per")?.withRenderingMode(.alwaysOriginal))
        
        v2.tabBarItem = UITabBarItem.init(title: "我的", image: UIImage(named: "wode_nor"), selectedImage: UIImage(named: "wode_per"))
        
        UITabBar.appearance().tintColor = UIColor.orange;
        tabBarController.viewControllers = [v1, v2]