崩溃在＆＃39; canEvaluatePolicy＆＃39;在osx 10.12.1中

Question

我使用以下代码在我的应用程序中验证用户

        let mycontext = LAContext()
    let authenticatonString = ""

    var authError :NSError? = nil

    if #available(OSX 10.12, *) {
        if mycontext.canEvaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, error: &authError) {
            mycontext.evaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, localizedReason: authenticatonString, reply: { (sucess, evaluationError) in
                if sucess == true {
                    self.resultLabel.stringValue = "authenticated successfully"
                } else {
                    print("error reason : \(evaluationError?.localizedDescription)")
                    self.resultLabel.stringValue = (evaluationError?.localizedDescription)!
                }
            })
        } else {
            self.resultLabel.stringValue = "touch id not available; so show passcode dialog"
        }
    } else {
        self.resultLabel.stringValue = "older version of osx; so show passcode dialog"
    }

虽然osx 10.12提供了touch id方法，但是canEvaluatePolicy方法在osx 10.12和10.12.1中崩溃并出现错误

Error Domain=com.apple.LocalAuthentication Code=-1001 "Unknown policy: '1'" UserInfo={NSLocalizedDescription=Unknown policy: '1'}

{10}也提供LAPolicy.deviceOwnerAuthenticationWithBiometrics

我想知道评估出了什么问题