Question

对于UIKit和ViewControllers，我是一个noobie。我试图从SplashScreenViewController切换到GameViewController这是一个SKView。 GameViewController加载正常，因为我可以听到游戏音乐开始，但SplashScreenController永远不会从屏幕上消失。所以我基本上SplashScreenController留在屏幕上，我可以在后台听到GameViewController。我做错了什么？

这是SplashScreenViewController：

的代码

class SplashScreenViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor(red:  46/255, green: 83/255, blue: 160/255, alpha: 1.0)
        let image : UIImage = UIImage(named:"splashScreen.png")!
        let bgImage = UIImageView(image: image)

        bgImage.frame = CGRect(origin: CGPoint(x: 3,y: -3), size: CGSize(width: self.view.frame.size.width, height: self.view.frame.size.height))
        self.view.addSubview(bgImage)

        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let controller = storyboard.instantiateViewController(withIdentifier: "GameViewController")
        self.present(controller, animated: true, completion: nil)
        self.dismiss(animated: true, completion: nil)
    }

    deinit {
        print("Object with name SplashScreenViewController is being released")
    }
}

Answer 1

您可以设置窗口的rootviewcontroller以将闪屏替换为游戏屏幕。代码看起来像这样

let appDelegate = UIApplication.shared.delegate as! AppDelegate
appDelegate.window!.rootViewController = gameViewController

Answer 2

据我所知，您希望将SplashScreenViewController替换为GameViewController。您当前的代码在解除它之后以模态和直接方式呈现GameViewController。因此没有显示新的视图控制器。

您的代码中的另一个问题是缺少时间差异，目前初始化启动屏幕，如果您的代码正常工作，它将被GameViewController替换，因此您只需请参阅GameViewController。

class SplashScreenViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor(red:  46/255, green: 83/255, blue: 160/255, alpha: 1.0)
        let image : UIImage = UIImage(named:"splashScreen.png")!
        let bgImage = UIImageView(image: image)

        bgImage.frame = CGRect(origin: CGPoint(x: 3,y: -3), size: CGSize(width: self.view.frame.size.width, height: self.view.frame.size.height))
        self.view.addSubview(bgImage)

        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let controller = storyboard.instantiateViewController(withIdentifier: "GameViewController")            

        // Here we create a dispatch queue to do some other code after an amount of time. In this case, one second.
        let dispatchTime = DispatchTime.now() + .seconds(1)
        DispatchQueue.main.asyncAfter(deadline: dispatchTime) {
           self.navigationController?.setViewControllers([controller!], animated: false)
        }
    }
}

此设置将在一秒钟后用GameViewController替换SplashScreenViewController。为了实现这一点，并且基本上在视图控制器之间进行所有导航，您必须将第一个视图控制器包装为UINavigationController。

Swift：更改ViewControllers时：前一个没有解除

2 个答案: