App通过face id和touch id认证后instantiateViewController问题

Question

我在我的页面中添加了一个 "touch id or face id" 按钮。我为此按钮创建了一个动作：btnTouchIdOrFaceIdIsPressed。问题 1：点击 touch id or face id 按钮后，在应用程序屏幕中没有打开 HomePageViewController。为什么？

@IBAction func btnTouchIdOrFaceIdIsPressed(_ sender: UIButton) {
    self.useBiometricAuthentication()
}

func useBiometricAuthentication () {
    let context = LAContext()
    var error : NSError?
    let reason = "some message for app user for the touch id or face id.."
    if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) {
        context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { (success, error) in
            if success {
                self.callMeAfterSuccessLoginAction()
            } else {
                //Question2: Can you write an explanation for this scope? Touch id or face is authentication is failed, right?
            }
        }
    } else {
        //Question3: Can you write an explanation for this scope? "device does not support face id or touch id", right?
    }
}

func callMeAfterSuccessLoginAction() {
    DispatchQueue.main.async {
        let oHomepageViewController = self.storyboard?.instantiateViewController(withIdentifier: "Homepage") as! HomepageViewController
        self.navigationController?.setViewControllers([oHomepageViewController], animated: true)
    }
}

请问问题2和问题3也可以回复一下吗？

Answer 1

Question1: It does not open the HomePageViewController in the app screen after I click on touch id or face id button. Why?

你可以检查一下你的navigationController是不是nil

print(navigationController ?? "NavigationController is nil")

Question2: Can you write an explanation for this scope? Touch id or face is authentication is failed, right?

Touch ID 或 Face ID 认证失败

Question3: Can you write an explanation for this scope? "device does not support face id or touch id", right?

Touch ID 或 FaceID 认证不可用，可能是用户没有设置

App通过face id和touch id认证后instantiateViewController问题

instantiateViewController problem after the app passes the face id and the touch id authentication

swift

xcode

swift4

xcode10