class MainViewController: UITabBarController {override func viewDidLoad() {super.viewDidLoad()//1.创建TabBar第一种方法addChildViewController( "HomeViewController",  "首页",  "tabbar_home")addChildViewController( "MessageViewController", "消息",  "tabbar_message_center")addChildViewController( "DiscoverViewController",  "发现", "tabbar_discover")addChildViewController( "ProfileViewController",  "我",  "tabbar_profile")}// swift支持方法的重载// 方法的重载:方法名称相同,但是参数不同. --> 1.参数的类型不同 2.参数的个数不同// private在当前文件中可以访问,但是其他文件不能访问private func addChildViewController(_ childVcName: String, _ title : String, _ imageName : String) {// 0.获取命名空间(Swift 类名格式: 主工程.类名 - WeiBo.HomeViewController)guard let nameSpace = Bundle.main.infoDictionary!["CFBundleExecutable"] as? String else {print("没有获取命名空间")return}// 1.根据字符串获取对应的Classguard let ChildVcClass = NSClassFromString(nameSpace + "." + childVcName) else {print("没有获取到字符串对应的Class")return}// 2.将对应的AnyObject转成控制器的类型guard let childVcType = ChildVcClass as? UIViewController.Type else {print("没有获取对应控制器的类型")return}// 3.创建对应的控制器对象let childVc = childVcType.init()// 4.设置子控制器的属性childVc.title = titlechildVc.tabBarItem.image = UIImage.noRenderingImageName(imageName: imageName)childVc.tabBarItem.selectedImage = UIImage.noRenderingImageName(imageName: imageName + "_highlighted")// 5.包装导航栏控制器let childNav = UINavigationController(rootViewController: childVc)// 6.添加控制器
        addChild(childNav)}}

class MainViewController: UITabBarController {override func viewDidLoad() {super.viewDidLoad()//2.通过json文件创建VC,动态初始化TabBarController// 1.获取json文件路径guard let jsonPath = Bundle.main.path(forResource: "MainVCSettings.json", ofType: nil) else {print("没有获取到对应的文件路径")return}// 2.读取json文件中的内容guard let jsonData = NSData(contentsOfFile: jsonPath) else {print("没有获取到json文件中数据")return}guard let anyObject = try? JSONSerialization.jsonObject(with: jsonData as Data, options: .mutableContainers) else {return}guard let dictArray = anyObject as? [[String : AnyObject]] else {return}// 4.遍历字典,获取对应的信息for dict in dictArray {// 4.1.获取控制器的对应的字符串guard let vcName = dict["vcName"] as? String else {continue}// 4.2.获取控制器显示的titleguard let title = dict["title"] as? String else {continue}// 4.3.获取控制器显示的图标名称guard let imageName = dict["imageName"] as? String else {continue}// 4.4.添加子控制器
            addChildViewController(vcName, title, imageName)}}// swift支持方法的重载// 方法的重载:方法名称相同,但是参数不同. --> 1.参数的类型不同 2.参数的个数不同// private在当前文件中可以访问,但是其他文件不能访问private func addChildViewController(_ childVcName: String, _ title : String, _ imageName : String) {// 0.获取命名空间(Swift 类名格式: 主工程.类名 - WeiBo.HomeViewController)guard let nameSpace = Bundle.main.infoDictionary!["CFBundleExecutable"] as? String else {print("没有获取命名空间")return}// 1.根据字符串获取对应的Classguard let ChildVcClass = NSClassFromString(nameSpace + "." + childVcName) else {print("没有获取到字符串对应的Class")return}// 2.将对应的AnyObject转成控制器的类型guard let childVcType = ChildVcClass as? UIViewController.Type else {print("没有获取对应控制器的类型")return}// 3.创建对应的控制器对象let childVc = childVcType.init()// 4.设置子控制器的属性childVc.title = titlechildVc.tabBarItem.image = UIImage.noRenderingImageName(imageName: imageName)childVc.tabBarItem.selectedImage = UIImage.noRenderingImageName(imageName: imageName + "_highlighted")// 5.包装导航栏控制器let childNav = UINavigationController(rootViewController: childVc)// 6.添加控制器
        addChild(childNav)}}

               do {try NSJSONSerialization.JSONObjectWithData(jsonData, options: .MutableContainers)} catch {// error异常的对象
                    print(error)}

                guard let anyObject = try? NSJSONSerialization.JSONObjectWithData(jsonData, options: .MutableContainers) else {return}

let anyObject = try! NSJSONSerialization.JSONObjectWithData(jsonData, options: .MutableContainers)