如何禁用＆＃34;触摸ID已激活＆＃34;每次登录到应用程序时提醒？

Question

我目前在我的应用中有touchID，目前它正常运行。每次登录＆＃34; touchID激活＆＃34;它都会有点烦人。警报弹出。有没有办法改变它，所以它只在第一次登录而不是再次弹出？这是我的触摸ID代码，我在登录屏幕的viewDidLoad中调用checkIfTouchIDActivated（）：

 // MARK: TouchID

  //Create a authentication context
  let authenticationContext = LAContext()
  var error:NSError?


  //Check if the device has a fingerprint sensor, if not, dismiss
  func checkIfTouchIDActivated () {

    guard authenticationContext.canEvaluatePolicy(.DeviceOwnerAuthenticationWithBiometrics, error: &error) else {
      print("TouchID not detected")
      return
    }
    print("TouchID detected")

    //Check the fingerprint
    authenticationContext.evaluatePolicy(
      .DeviceOwnerAuthenticationWithBiometrics,
      localizedReason: "TouchID activated",
      reply: { [unowned self] (success, error) -> Void in

        //fingerprint has been recognized
        if( success ){

          self.loginButtonPressed(self)

        }else {

          // Check if there is an error
          if let error = error {

            let message = self.touchID.errorMessageForLAErrorCode(error.code)
            self.showAlertViewAfterEvaluatingPolicyWithMessage(message)

          }

        }

      })
  }

Answer 1

您已将"TouchID activated"作为localizedReason。如果您不想向用户显示您要为其验证身份的原因，请提供""。它通常类似于"Are you the device owner?"或"Sign in with your touch-ID"，表明您向用户请求touch-id身份验证的原因。