ios - Game Center 未经身份验证，在 iOS 12 中请求身份验证

Question

swift 4、iOS 12。

使用 Game Center 记录游戏中的高分。一切正常，假设用户登录到游戏中心。我可以检测到他们什么时候没有，但不能完全弄清楚在这种情况下如何打开 Game Center。

func ask4GameCenter() {
    let myAlert: UIAlertController = UIAlertController(title: "Attention", message: "Log into Game Center to record High Scores", preferredStyle: .alert)

    myAlert.addAction(UIAlertAction(title: "Ignore", style: .default, handler: { (action) in
        self.gameOn()
    }))
    myAlert.addAction(UIAlertAction(title: "Logon", style: .default, handler: { (action) in
        UIApplication.shared.open(NSURL(string: "gamecenter:")! as URL, options: [:], completionHandler: { (success) in
            if success {
                self.gameOn()
            }
        })
    }))
    self.view?.window?.rootViewController?.present(myAlert, animated: true, completion: nil)
}

Answer 1

好的，我找到了答案。

func ask4GameCenter() {
    let myAlert: UIAlertController = UIAlertController(title: "Attention", message: "Log into Game Center to record High Scores", preferredStyle: .alert)

    myAlert.addAction(UIAlertAction(title: "Ignore", style: .default, handler: { (action) in
        self.gameOn()
    }))
    myAlert.addAction(UIAlertAction(title: "Logon", style: .default, handler: { (action) in
        guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
            return
        }
        UIApplication.shared.open(settingsUrl, options: [:], completionHandler: { (success) in
            if success {
                self.gameOn()
            }
        })
    }))
    self.view?.window?.rootViewController?.present(myAlert, animated: true, completion: nil)
}