Local Authentication할 게이트 화면 추가

View Controller를 Root 화면에 추가

버튼 핸들러 추가

        void AuthenticateMe (UIButton sender) 
        {    
            var context = new LAContext(); 
            NSError AuthError; 
            var myReason = new NSString("To add a new chore"); 

            if (context.CanEvaluatePolicy(
                LAPolicy.DeviceOwnerAuthenticationWithBiometrics, 
                out AuthError)){ 

                var replyHandler = new LAContextReplyHandler((success, error) => 
                    { 
                        this.InvokeOnMainThread(()=>{ 
                            if(success){ 
                                Console.WriteLine("You logged in!"); 
                                PerformSegue("AuthenticationSegue", this); 
                            } else{ 
                                //Show fallback mechanism here 
                            } 
                        }); 
                    }); 
                context.EvaluatePolicy(
                    LAPolicy.DeviceOwnerAuthenticationWithBiometrics, myReason, replyHandler); 
            }; 
        }

        partial void AuthenticateButton_TouchUpInside (UIButton sender)
        {
            this.AuthenticateMe(sender);
        }

대상 OS 변경

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