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()          
    }

上面的代码正常工作，但是应用程序未显示选项卡栏项，即使单击中心选项卡栏项时它也可以工作。

Answer 1

将代码行替换为：

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

并在情节提要中将“ myDealNavController”设置为您的UINavigationController的标识符。