swift - PageViewController(应用程序演示)用于首次启动，然后是 tabBarViewController、Swift

Question

我有一个带有 3 个 View 的 PageViewController 来展示应用程序，在最后一页上，我有一个与我的 TabBarViewController 链接的按钮。
我只想在第一次启动时有 3 个演示 View ，然后在下次启动时直接从我的 TabBarViewController 开始。

我该怎么做？
谢谢!!!

Answer 1

编辑

tabBarController:

 required init(coder aDecoder: NSCoder)
  {
      super.init(coder: aDecoder)!
  }

页面 View 和 tabBar 之间的按钮:

@IBAction func firstTime() {

    NSUserDefaults.standardUserDefaults().setBool(true, forKey: "hasAppBeenLaunchedBefore")
    print(true)

}

应用程序委托(delegate):

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

    // Override point for customization after application launch.

    didFinishLaunchingOnce()


    return true
}

func didFinishLaunchingOnce() -> Bool
{
    let defaults = NSUserDefaults.standardUserDefaults()

    if let hasBeenLauncherBefore = defaults.stringForKey("hasAppBeenLaunchedBefore")
    {
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        var exampleViewController: TabBarViewController = mainStoryboard.instantiateViewControllerWithIdentifier("TabBarViewController") as! TabBarViewController

        self.window?.rootViewController = exampleViewController

        self.window?.makeKeyAndVisible()
        //print(" N-th time app launched ")
        return true
    }
    else
    {
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        var exampleViewController: OnboardingPager = mainStoryboard.instantiateViewControllerWithIdentifier("OnboardingPager") as! OnboardingPager

        self.window?.rootViewController = exampleViewController

        self.window?.makeKeyAndVisible()
        //print(" First time app launched ")
        defaults.setBool(true, forKey: "hasAppBeenLaunchedBefore")
        return false
    }
}

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