LaunchScreen加载后显示ViewController

Question

我正在尝试为我的应用程序创建一个演练（介绍）。我正在使用BWWalkthrough来做到这一点。如果想在点击一个按钮后打开这个视图控制器，它会起作用（正如你可以在下面的代码中看到的那样）。但我不想这样做。我想在启动屏幕加载后打开此视图控制器。

当我点击主视图的“初始视图控制器”，并在viewDidLoad方法中添加了下面的代码时，我只能看到母版页，但看不到视图控制器（page_one，page_two ...）页。可能我必须在AppDelegate中编写一些代码，但我不知道它怎么样

我该如何解决这个问题？

@IBAction func testButton(_ sender: Any) { 

    let goStoryboard = UIStoryboard(name: "Main", bundle: nil) 
    let walkthrough = goStoryboard.instantiateViewController(withIdentifier: "master") as! BWWalkthroughViewController 
    let page_one = goStoryboard.instantiateViewController(withIdentifier: "page1") as UIViewController 
    let page_two = goStoryboard.instantiateViewController(withIdentifier: "page2")as UIViewController 
    let page_three = goStoryboard.instantiateViewController(withIdentifier: "page3")as UIViewController 

    **// Attach the pages to the master** 
    walkthrough.delegate = self 
    walkthrough.add(viewController:page_one) 
    walkthrough.add(viewController:page_two) 
    walkthrough.add(viewController:page_three) 

    self.present(walkthrough, animated: true, completion: nil) 

} 

Answer 1

首先，转到您的主要故事板并创建一个新的视图控制器。你还应该创建一个视图控制器类。这将是您的主屏幕故事板，并且您将把它设置为您的初始视图控制器。

您先前创建的类，你可以把这个：

class HomeViewController: UIViewController { 
    override viewDidLoad(){ 
     super.viewDidLoad() 
     let goStoryboard = UIStoryboard(name: "Main", bundle: nil) 
     let walkthrough = goStoryboard.instantiateViewController(withIdentifier: "master") as! BWWalkthroughViewController 
     let page_one = goStoryboard.instantiateViewController(withIdentifier: "page1") as UIViewController 
     let page_two = goStoryboard.instantiateViewController(withIdentifier: "page2")as UIViewController 
     let page_three = goStoryboard.instantiateViewController(withIdentifier: "page3")as UIViewController 

     // Attach the pages to the master 
     walkthrough.delegate = self 
     walkthrough.add(viewController:page_one) 
     walkthrough.add(viewController:page_two) 
     walkthrough.add(viewController:page_three) 

     self.present(walkthrough, animated: true, completion: nil) 
    } 
}