Question

我在页面中添加了“触摸ID或面部ID”按钮。我为此按钮创建了一个动作：btnTouchIdOrFaceIdIsPressed。问题1：单击HomePageViewController id按钮后，它没有在应用程序屏幕中打开touch id or face。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)
    }
}

您还可以回答问题2和问题3吗？

Answer 1

问题1：它无法在应用程序中打开HomePageViewController 单击触摸ID或面部ID按钮后的屏幕。为什么？

您可以检查您的navigationController是否不为空

Throwable

问题2：您能为此范围写一个解释吗？触摸ID或面部认证失败，对吗？

触摸ID或面部ID身份验证失败

问题3：您能为此范围写一个解释吗？ “设备不支持面部识别或触摸识别”，对吗？

Touch ID或FaceID身份验证不可用，可能是用户未设置

应用程序通过面部ID和触摸ID身份验证后出现InstantiateViewController问题

1 个答案: