如何检查视图控制器是否具有指定的标识符可用

最后，我找到了一个解决办法

extension UIStoryboard {
    func instantiateVC(withIdentifier identifier: String) -> UIViewController? {
        // "identifierToNibNameMap" – dont change it. It is a key for searching IDs 
        if let identifiersList = self.value(forKey: "identifierToNibNameMap") as? [String: Any] {
            if identifiersList[identifier] != nil {
                return self.instantiateViewController(withIdentifier: identifier)
            }
        }
        return nil
    }
}

我用了如下的方法

let identifier = Constants.menuSections[indexPath.section-1][indexPath.row-1]

 if let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateVC(withIdentifier: identifier) {
          let navi = BaseNaviViewController(rootViewController:viewController)
                 navi.navigationBar.tintColor = .white
                 navi.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
                 sideMenuController?.embed(centerViewController:navi, cacheIdentifier:identifier)
        }
        else {

            ServerService.ShowAlertMessage(ErrorMessage: "No controller Available", title: "Oops . . . !", view: self)
        }