效果图：
Paste_Image.png
实现步骤
- 导入框架文件
FXAnimationTabBarController.swift,框架下载地址
https://github.com/Guodadada/FXAnimationTabBarController - 创建一个继承
AnimationTabBarController类的TabBarControllerViewController - 调用提供的方法添加子控制器：
tabBarControllerAddChildViewController(childView: UIViewController, title: String, imageName: String, selectedImageName: String, tag: Int)
比如：
tabBarControllerAddChildViewController(HomeViewController(), title: "首页", imageName: "tabbar_home", selectedImageName: "v2_home_r", tag: 0)
tabBarControllerAddChildViewController(SupermarketViewController(), title: "消息", imageName: "tabbar_message_center", selectedImageName: "v2_order_r", tag: 1)
tabBarControllerAddChildViewController(ShopCartViewController(), title: "发现", imageName: "tabbar_discover", selectedImageName: "shopCart_r", tag: 2)
tabBarControllerAddChildViewController(MineViewController(), title: "设置", imageName: "tabbar_profile", selectedImageName: "v2_my_r", tag: 3)
可以自定义包裹UINavigationController，比如:
let nav = UINavigationController(rootViewController: HomeViewController())
nav.navigationBar.topItem?.title = "首页"
tabBarControllerAddChildViewController(nav, title: "首页", imageName: "tabbar_home", selectedImageName: "v2_home_r", tag: 0)
注意： 此框架不适合自定义的TabBar
