XML保存账号密码

using System;
using System.Collections;
using System.IO;
using System.Xml;
using UnityEngine;
using UnityEngine.SceneManagement;

public enum GameModel
{
    easy,
    normal,
    hard
}
public enum GameControllerModel
{
    mouse,
    keyboard,
    joystack
}
public class UIController : MonoBehaviour 
{
    public UIInput acc;
    public UIInput pass;
    public UIInput Regacc;
    public UIInput RegPass;
    public UIInput RegPass1;
    public UIButton login;
    public UIButton Register;
    public UIButton Setting;
    public UIPopupList gameModleList;
    public UIPopupList gameControllerModelList;
    public GameObject MessageBox;
    GameControllerModel gameControllerModel = GameControllerModel.mouse;
    GameModel gameModel = GameModel.normal;
    string path;
    void Start()
    {
        path = Application.dataPath + "/userInfo.xml";
        Setting.onClick.Add(new EventDelegate(SetSave));
        Register.onClick.Add(new EventDelegate(RegisterSave));
        login.onClick.Add(new EventDelegate(LogIn));
    }

    public void LogIn()
    {
       
        string Account = "";
        string PassWord = "";
        if (File.Exists(path))
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(path);
            XmlNodeList list = xmlDoc.SelectSingleNode("userInfo").ChildNodes;
            foreach (XmlElement item in list)
            {
                if (item.Name == "acc")
                {
                    Account = item.InnerText;
                    Debug.Log("Account="+ Account);
                }
                if (item.Name == "pass")
                {
                    PassWord = item.InnerText;
                    Debug.Log("PassWord="+ PassWord);
                }
            }
            if (acc.value != "" && pass.value != "" && PassWord.Equals(pass.value) && Account.Equals(acc.value))
            {
                Debug.Log("登陆成功");
                SceneManager.LoadScene("ReaperStart");
            }

        }
        else
        {
            OpenMessageBox("输入的账号后密码有错");
        }
    }

    private void RegisterSave()
    {
        if (Regacc.value != "" && RegPass.value != "" && RegPass1.value != "" && RegPass.value.Equals(RegPass1.value))
        {
            PlayerPrefs.SetString("pass", RegPass.value);
            PlayerPrefs.SetString("acc", Regacc.value);

                XmlDocument xmlDocument = new XmlDocument();
                XmlNode node = xmlDocument.CreateXmlDeclaration("1.0", "utf-8", null);
                xmlDocument.AppendChild(node);
                XmlNode userInfo = xmlDocument.CreateElement("userInfo");
                XmlElement acc = xmlDocument.CreateElement("acc");
                acc.InnerText = Regacc.value;
                XmlElement pass = xmlDocument.CreateElement("pass");
                pass.InnerText = RegPass.value;
                userInfo.AppendChild(acc);
                userInfo.AppendChild(pass);
                xmlDocument.AppendChild(userInfo);
                xmlDocument.Save(path);


            
            
        }
        else
        {
            OpenMessageBox("输入的账号后密码有错");
        }
    }


    private void SetSave()
    {
        switch (gameControllerModelList.value)
        {
            case "鼠标":
                gameControllerModel = GameControllerModel.mouse;
                break;
            case "键盘":
                gameControllerModel = GameControllerModel.keyboard;
                break;
            case "手柄":
                gameControllerModel = GameControllerModel.joystack;
                break;
        }
        switch (gameModleList.value)
        {
            case "鼠标":
                gameModel = GameModel.easy;
                break;
            case "键盘":
                gameModel = GameModel.normal;
                break;
            case "手柄":
                gameModel = GameModel.hard;
                break;
        }
    }

    void OpenMessageBox(string text)
    {
        MessageBox.GetComponentInChildren<TweenPosition>().PlayForward();
        MessageBox.GetComponentInChildren<UILabel>().text = text;
    }
}