问将面部ID生物识别认证限制为3

EN

func loginWithBiometrics() {
        let context = LAContext()
        var error: NSError?

        if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) {
            let reason = "Identify yourself!"

            context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { [weak self] success, authenticationError in
                DispatchQueue.main.async {
                    if success {
                        print("success")
                    } else {
                        print("Failed biometric!")
                    }
                }
            }
        } else {
            print("Biometric not available!")
        }
}