标签栏项目未显示

Question

    if(!isUserLoggedIn){

        var loginViewController = mainStoryBoard.instantiateViewControllerWithIdentifier("loginView") as! LoginViewController

        window!.rootViewController = loginViewController
        window!.makeKeyAndVisible()

    }else{

        var mainViewController = mainStoryBoard.instantiateViewControllerWithIdentifier("mainView") as! FirstViewController         
        var myDealsViewController  = mainStoryBoard.instantiateViewControllerWithIdentifier("myDealsViewController") as!MyDealsViewController            
        var settingsViewController  = mainStoryBoard.instantiateViewControllerWithIdentifier("settingsView") as! SettingsViewController            
        var centerNav = UINavigationController(rootViewController: mainViewController) as UINavigationController
        var myDealNavController = UINavigationController(rootViewController: myDealsViewController) as UINavigationController            
        let controllers = [centerNav,myDealNavController,settingsViewController]
        tabBarController.viewControllers = controllers

        window!.rootViewController = tabBarController
        window!.makeKeyAndVisible()          
    }

以上代码正常运行，但即使单击中心标签栏项目，该应用也未显示标签栏项目。

Answer 1

用以下代码替换代码行：

var myDealNavController = mainStoryBoard.instantiateViewControllerWithIdentifier("myDealNavController") as! UINavigationController

将“myDealNavController”设置为故事板中UINavigationController的标识符。