Using Multiple Storyboards with Tab Bar Controller

Question

I'm trying to get my application to load up a different storyboard depending on the device that it is running on. Right now, I have been able to detect the device and set the rootViewController in the AppDelegate based on it. I've noticed, however, that when I do this, my Tab Bar Controller disappears. I think this is happening because I am simply setting the rootViewController as a new instance. How would I fix this problem so that the Tab Bar will be visible?

AppDelegate.swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    window =  UIWindow(frame: UIScreen.mainScreen().bounds)
    window?.makeKeyAndVisible()


    if ((UIDevice.currentDevice().modelName == "iPhone 5") || (UIDevice.currentDevice().modelName == "iPhone 5c") || (UIDevice.currentDevice().modelName == "iPhone 5s") || (UIDevice.currentDevice().modelName == "iPhone SE") || (UIDevice.currentDevice().modelName == "iPod Touch 5") || (UIDevice.currentDevice().modelName == "iPod Touch 6")) {

        storyboard = UIStoryboard(name: "iPhoneSE", bundle: nil)
        let rootController = storyboard!.instantiateViewControllerWithIdentifier("login5")

        if let window = self.window {
            window.rootViewController = rootController
        }

        print("-----------------------iPhone5-----------------------")

    } else if ((UIDevice.currentDevice().modelName == "iPhone 6") || (UIDevice.currentDevice().modelName == "iPhone 6s")){

        storyboard = UIStoryboard(name: "iPhone6", bundle: nil)
        let rootController = storyboard!.instantiateViewControllerWithIdentifier("login6")

        if let window = self.window {
            window.rootViewController = rootController
        }

        print("-----------------------iPhone6-----------------------")

    } 

Answer 1

Just a real stupid idea: You are making the window visible before you instantiate the relevant StoryBoard. Try moving the makeKeyAndVisible() line after the conditionals.