如何在iOS 8中獲取指紋數據？

Question

為此，我使用La Authentication框架，但借助該方法，我沒有指紋數據，它只返回布爾值（即true和false），所以它無法幫助我獲取變量中的指紋數據，因此我將對其進行進一步處理。 幫我。

以下是示例代碼，

func authenticateUser() {
  ...

  // Check if the device can evaluate the policy.
  if context.canEvaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, error: &error) {
    [context .evaluatePolicy(LAPolicy.DeviceOwnerAuthenticationWithBiometrics, localizedReason: reasonString, reply: { (success: Bool, evalPolicyError: NSError?) -> Void in

      if success {

      }
      else {
        // If authentication failed then show a message to the console with a short description.
        // In case that the error is a user fallback, then show the password alert view.
        println(evalPolicyError?.localizedDescription)

        switch evalPolicyError!.code {
          case LAError.SystemCancel.toRaw():
            println("Authentication was cancelled by the system")

          case LAError.UserCancel.toRaw():
            println("Authentication was cancelled by the user")

          case LAError.UserFallback.toRaw():
            println("User selected to enter custom password")
            NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
              self.showPasswordAlert()
            })

          default:
            println("Authentication failed")
            NSOperationQueue.mainQueue().addOperationWithBlock({ () -> Void in
              self.showPasswordAlert()
            })
        }
      }
    })]
  }
}

Answer 1

您不能，Apple不允許訪問指紋數據。 這與安全性有關。

iOS SDK僅允許您讓用戶使用Touch ID驗證自己。