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我想讓用戶在首次啓動應用程序時獲得歡迎屏幕/教程。如果它不是該應用的首次發佈，那麼它將像往常一樣開放。啓動時的歡迎屏幕
如果應用程序正常打開，我已將歡迎屏幕綁定到按鈕功能。我正在使用BWWalkThroughViewController。這是我的按鈕功能代碼：
@IBAction func showWalkThroughButtonPressed() {
// Get view controllers and build the walkthrough
let stb = UIStoryboard(name: "MainStoryboard", bundle: nil)
let walkthrough = stb.instantiateViewControllerWithIdentifier("walk0") as! BWWalkthroughViewController
let page_one = stb.instantiateViewControllerWithIdentifier("walk1") as UIViewController
let page_two = stb.instantiateViewControllerWithIdentifier("walk2") as UIViewController
let page_three = stb.instantiateViewControllerWithIdentifier("walk3") as UIViewController
let page_four = stb.instantiateViewControllerWithIdentifier("walk4") as UIViewController
let page_five = stb.instantiateViewControllerWithIdentifier("walk5") as UIViewController
// Attach the pages to the master
walkthrough.delegate = self
walkthrough.addViewController(page_one)
walkthrough.addViewController(page_two)
walkthrough.addViewController(page_three)
walkthrough.addViewController(page_four)
walkthrough.addViewController(page_five)
self.presentViewController(walkthrough, animated: true, completion: nil)
}
func walkthroughCloseButtonPressed() {
self.dismissViewControllerAnimated(true, completion: nil)
}
該代碼位於MyTableViewController.swift文件中。
這裏就是我想不通：
我想要的視圖控制器來顯示第一次啓動。一旦用戶完成教程，他們可以按關閉按鈕，它將關閉。我有代碼來檢查它是否是該應用的首次發佈。它位於AppDelegate.swift文件中。代碼如下：
// First Launch Check
let notFirstLaunch = NSUserDefaults.standardUserDefaults().boolForKey("FirstLaunch")
if notFirstLaunch {
print("First launch, setting NSUserDefault")
NSUserDefaults.standardUserDefaults().setBool(true, forKey: "FirstLaunch")
}
else {
print("Not first launch.")
}
return true
那麼我怎樣才能在首次啓動時獲得歡迎屏幕呢？我是否必須在AppDelegate中創建一個函數來處理這個問題，如果有的話，我需要做些什麼才能使該教程成爲第一次啓動時的初始視圖控制器？