• 1.創(chuàng)建一個(gè)json文件

創(chuàng)建一個(gè)json文件

// MARK: 添加子控制器
private func addChileControllers(){
    
    
    // 1.獲取json文件路徑
    let path = Bundle.main.path(forResource: "MainVCSettings.json", ofType: nil)
    // 2.通過(guò)文件路徑創(chuàng)建data
    if let jsonPath = path{
    
        let jsonData = NSData(contentsOfFile: jsonPath)
        
        do {
            // 有可能發(fā)生異常的代碼放到這里
            // 3.序列化json數(shù)據(jù) --> Array
            // try : 發(fā)生異常會(huì)跳到catch 中繼續(xù)執(zhí)行
            let dictArr =  try JSONSerialization.jsonObject(with: jsonData! as Data, options: JSONSerialization.ReadingOptions.mutableContainers)
            
            // 4.遍歷數(shù)組谓苟，動(dòng)態(tài)創(chuàng)建控制器和設(shè)置數(shù)據(jù)
            // 在Swift中祝辣，如果需要遍歷一個(gè)數(shù)組蹬叭，必須明確數(shù)據(jù)的類型
            
            for dict in dictArr as! [[String: String]] {
                
                addChildViewController(childControllerName: dict["vcName"]!, tittle: dict["title"]!, imageName: dict["imageName"]!)
            }
            
            print(dictArr)
            
        } catch {
            
            // 發(fā)生異常會(huì)執(zhí)行的代碼
            print(error)
            
            // 從本地加載控制器
            addChildViewController(childControllerName: "HomeViewController", tittle: "首頁(yè)", imageName: "tabbar_home")
            addChildViewController(childControllerName: "MessageViewController", tittle: "消息", imageName: "tabbar_message_center")
            addChildViewController(childControllerName: "DiscoverViewController", tittle: "廣場(chǎng)", imageName: "tabbar_discover")
            addChildViewController(childControllerName: "ProfileViewController", tittle: "我", imageName: "tabbar_profile")
        }
        
    }

}

// MARK: 具體的每個(gè)控制器的操作
private func addChildViewController(childControllerName: String,tittle:String ,imageName:String) {
    
    // 1.動(dòng)態(tài)獲取命名空間
    let namespace = Bundle.main.infoDictionary!["CFBundleExecutable"] as! String
    
    // 2.將字符串轉(zhuǎn)換為類
    // 2.1.默認(rèn)情況下命名空間就是項(xiàng)目的名稱访得，但是命名空間的名稱是可以更改的
    let Clas: AnyClass? = NSClassFromString(namespace + "." + childControllerName)
    
    // 3.通過(guò)類創(chuàng)建對(duì)象
    // 3.1.將AnyClass 轉(zhuǎn)化為指定的類
    let vcClass = Clas as! UIViewController.Type
    
    // 4.通過(guò)class創(chuàng)建對(duì)象
    let vc = vcClass.init()
    
    // 1.設(shè)置首頁(yè)對(duì)應(yīng)的數(shù)據(jù)
    vc.tabBarItem.image = UIImage(named: imageName)
    vc.tabBarItem.selectedImage = UIImage(named: imageName + "_highlighted")
    vc.title = tittle
    
    // 2.給子控制器包裝一個(gè)導(dǎo)航控制器
    let nav = UINavigationController()
    nav.addChildViewController(vc)
    
    // 3.將導(dǎo)航控制器添加到當(dāng)前控制器上
    addChildViewController(nav)
}