延迟GameCenter身份验证视图控制器的演示-Swift 4.2

Question

我正在尝试将GameCenter 身份验证视图控制器延迟2秒钟，然后再进行介绍。 我的VC中大约有2秒钟的按钮动画发生，我不希望被GameCenter Authentication View Controller的显示所阻止。 有什么建议么？

override func viewDidLoad() {
    super.viewDidLoad()

     // Game Center - Authentication of player
     NotificationCenter.default.addObserver(self, selector: #selector(showAuthenticationViewController), name: NSNotification.Name(GameKitHelper.PresentAuthenticationViewController), object: nil)

     GameKitHelper.sharedInstance.authenticateLocalPlayer()
}

// Game Center - Presents authentication view controller
@objc func showAuthenticationViewController() {
    let gameKitHelper = GameKitHelper.sharedInstance
    if let authenticationViewController =
        gameKitHelper.authenticationViewController {
        self.present(authenticationViewController, animated: true, completion: nil)
    }

}

// add this to deregister for notifications when the object is deallocated
deinit {
    NotificationCenter.default.removeObserver(self)
}

Answer 1

也许，好的旧的Grand Central Dispatch（GCD）可以完成工作。 2.0持续2秒，但是将其更改为所需的时间。

override func viewDidLoad() {
    super.viewDidLoad()

    DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {

         // Game Center - Authentication of player
        NotificationCenter.default.addObserver(self, selector: #selector(self.showAuthenticationViewController), name: NSNotification.Name(GameKitHelper.PresentAuthenticationViewController), object: nil)

        GameKitHelper.sharedInstance.authenticateLocalPlayer()
    }
}