Unity C#数据持久化与XML
发表于2018-10-30
大家工作中可能需要用到数据持久化，这篇文章就给大家分享下数据持久化的使用。数据持久化大体都是通过xml或者json来进行的，unity为我们自定义了数据持久化方法，但是比较局限，还需要自己来完成数据持久化方法。
一、Unity方法
unity提供了三个方法来实现数据持久化，不过只能对int float string类型进行数据持久化，命令如下
//设定Key=float的值为12f
PlayerPrefs.SetFloat("float", 12f);
//通过key值“float”获取数值12，如果“float”未设定值，则默认为1f
PlayerPrefs.GetFloat("float", 1f);
//相关定义与setfloat相同
PlayerPrefs.SetInt("int", 12);
PlayerPrefs.GetInt("int", 1);
PlayerPrefs.SetString("str", "abc");
PlayerPrefs.GetString("str", "default");
unity提供的方法比较局限，复杂数据还需要自己进行数据可持续化。
二、C#与xml
通过C#编写读取修改xml
1.编写xml
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.IO;
namespace MenuData
｛
class Program
｛
static void Main(string[] args)
｛
string filePath = "";
string fileName = "MenuData.xml";
string targetFile = Path.Combine(filePath, fileName);
string[] mainMenu = new string[]｛
"文件","配置","显示","诊断","投入运行","关机","帮助"｝;
string[] parentMenu = new string[]
｛
"投入运行助手","测量","调整","软件更新","售后服务","机器人数据","网络配置","辅助软件"
｝;
string[] childMenu = new string[]
｛
"工具","基坐标","固定工具","附加负载数据","外部运动装置","测量点","允差"
｝;
string[] toolMenu = new string[]
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"XYZ_4点法","XTZ_参照法","ABC_2点法","ABC_世界坐标系","数字输入","更改名称","工具负荷数据"
｝;
string[] baseMenu = new string[]
｛
"_3点法","间接","数字输入","更改名称"
｝;
XmlDocument xmldoc = new XmlDocument();
//加入XML的声明段落,<?xml version="1.0" encoding="gb2312"?>
XmlDeclaration xmldecl;
xmldecl = xmldoc.CreateXmlDeclaration("1.0", "gb2312", null);
xmldoc.AppendChild(xmldecl);
XmlElement menu = xmldoc.CreateElement("", "Menu", "");
xmldoc.AppendChild(menu);
//XmlNode root = xmldoc.SelectSingleNode("Menu");//查找<menu>
for (int i = 0; i < mainMenu.Length; i++)
｛
XmlElement rootElem = xmldoc.CreateElement(mainMenu[i]);//创建一个<mainMenu[i]>节点
rootElem.SetAttribute("Layer", "1");//设置该节点ID属性
if (i == 4)
｛
for (int j = 0; j < parentMenu.Length; j++)
｛
XmlElement parentElem = xmldoc.CreateElement(parentMenu[j]);//创建一个<parentElem[i]>节点
parentElem.SetAttribute("Layer", "2");//设置该节点ID属性
if (j == 1)
｛
for (int m = 0; m < childMenu.Length; m++)
｛
XmlElement childElem = xmldoc.CreateElement(childMenu[m]);//创建一个<childMenu[i]>节点
childElem.SetAttribute("Layer", "3");
if (m == 0)
｛
for (int ii = 0; ii < toolMenu.Length; ii++)
｛
XmlElement elem = xmldoc.CreateElement(toolMenu[ii]);//创建一个<childMenu[i]>节点
elem.SetAttribute("Layer", "4");
// elem.InnerText = toolMenu[ii];
childElem.AppendChild(elem);
｝
｝
if (m == 1)
｛
for (int ii = 0; ii < baseMenu.Length; ii++)
｛
XmlElement elem = xmldoc.CreateElement(baseMenu[ii]);//创建一个<childMenu[i]>节点
elem.SetAttribute("Layer", "4"); // elem.SetAttribute("type", "noChild");
//elem.InnerText = baseMenu[ii];
childElem.AppendChild(elem);
｝
｝
parentElem.AppendChild(childElem);
｝
｝
rootElem.AppendChild(parentElem);
｝
｝
menu.AppendChild(rootElem);
｝
xmldoc.Save(targetFile);
Console.ReadKey();
｝
｝
｝
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
namespace XmlRW
｛
class Program
｛
static void Main(string[] args)
｛
XmlDocument xmldoc = new XmlDocument();
//加入XML的声明段落,<?xml version="1.0" encoding="gb2312"?>
XmlDeclaration xmldecl;
xmldecl = xmldoc.CreateXmlDeclaration("1.0", "gb2312", null);
xmldoc.AppendChild(xmldecl);
//加入一个根元素
XmlElement xmlelem = xmldoc.CreateElement("", "ToolAndFrame", "");
xmldoc.AppendChild(xmlelem);
for (int i = 1; i < 3; i++)
｛
string identifyStr;
string id;
int count;
if(i==1)
｛
identifyStr = "tool";
count = 16;
｝
else
｛
identifyStr = "frame";
count = 32;
｝
//增加次级节点
XmlNode root = xmldoc.SelectSingleNode("ToolAndFrame");//查找<ToolAndFrame>
XmlElement elem = xmldoc.CreateElement(identifyStr);//创建一个<identifyStr>节点
elem.SetAttribute("ID", identifyStr);//设置该节点ID属性
//xe1.SetAttribute("ISBN", "2-3631-4");//设置该节点ISBN属性
for(int j=0;j<count;j++)
｛
XmlElement toolElem = xmldoc.CreateElement("elem"+i.ToString());
toolElem.SetAttribute("ID", j.ToString());
toolElem.InnerText = "未知 [?]";
elem.AppendChild(toolElem);
｝
root.AppendChild(elem);//添加到<Employees>节点中
｝
xmldoc.Save("ToolAndFrame.xml");
｝
｝
｝
2.读取
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
namespace ReadXml
｛
class Program
｛
static void Main(string[] args)
｛
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("ToolAndFrame.xml");
List<string> strList = new List<string>();
XmlNodeList nodeList = xmlDoc.SelectSingleNode("ToolAndFrame").ChildNodes;//获取Employees节点的所有子节点
foreach (XmlNode temp in nodeList)//遍历所有子节点
｛
XmlElement elem = (XmlElement)temp;//将子节点类型转换为XmlElement类型
//if (elem.GetAttribute("genre") == "张三")//如果genre属性值为“张三”
//｛
// elem.SetAttribute("genre", "update张三");//则修改该属性为“update张三”
//｝
XmlNodeList childElem = elem.ChildNodes;//继续获取xe子节点的所有子节点
foreach (XmlNode node in childElem)//遍历
｛
XmlElement xml = (XmlElement)node;//转换类型
//if (xml.Name == "author")//如果找到
//｛
// xml.InnerText = "亚胜";//则修改
//｝
strList.Add(xml.InnerText);
｝
｝
foreach(string str in strList)
｛
Console.WriteLine(str);
｝
Console.WriteLine(strList.Count);
Console.ReadKey();
｝
｝
｝
3.查找与更改
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
namespace ChangeText
｛
class Program
｛
static void Main(string[] args)
｛
string id = "tool";
int num = 7;
string text = "new Name";
ChangeVal(id, num, text);
｝
public static void ChangeVal(string id,int num,string text)
｛
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load("ToolAndFrame.xml");
// List<string> strList = new List<string>();
XmlNodeList nodeList = xmlDoc.SelectSingleNode("ToolAndFrame").ChildNodes;//获取Employees节点的所有子节点
foreach (XmlNode temp in nodeList)//遍历所有子节点
｛
XmlElement elem = (XmlElement)temp;//将子节点类型转换为XmlElement类型
if (elem.Name == id)//如果elem的名字为“张三”
｛
Console.WriteLine(elem.GetAttribute("ID"));
Console.WriteLine(elem.Name);
XmlNodeList childElem = elem.ChildNodes;//继续获取xe子节点的所有子节点
foreach (XmlNode node in childElem)//遍历
｛
XmlElement xml = (XmlElement)node;//转换类型
if (xml.GetAttribute("ID") == num.ToString())
｛
xml.InnerText = text;
break;
｝
｝
break;
｝
｝
xmlDoc.Save("ToolAndFrame.xml");
Console.ReadKey();
｝
｝
｝
本文查找与更改只是更改了属性，如果需要添加节点或者删除节点，只需要查找到相关节点以后，用命令remvoechild即可，最后一定要保存。
三、json
如果采用json格式实现数据可持续化则可以直接采用unity方法jsonUtility来实现
private string WriteTOJson()
｛
string json = JsonUtility.ToJson(jsonData);
return json;
｝
private PersistData ReadFromJson(string json)
｛
PersistData jsonClass = JsonUtility.FromJson<PersistData>(json);
return jsonClass;
｝
class PersistData
｛
public long width;
public long top;
public long left;
public long height;
｝
对于list格式的参数进行解析时要增加serializable
如下所示：
#region jsonClass
[Serializable]
public class ListModel
｛
public int ListContentId;
public string CName;//新版本
public string EName;//新版本
//public string Name;//旧版本
public string BigResourcePath;
public string BigResourceName;
public string BigResourceType;
public string SmallResourcePath;
public string SmallResourceName;
public string SmallResourceType;
public DateTime UpdateTime;
public int Order;
public int Level;
public int ParentId;
//public int ListContentId;
//public string Name;
//public string BigResourcePath;
//public string BigResourceName;
//public string BigResourceType;
//public string SmallResourcePath;
//public string SmallResourceName;
//public string SmallResourceType;
//public DateTime UpdateTime;
//public int Order;
//public int Level;
//public int ParentID;
｝
[Serializable]
public class ListLevelModel
｛
public bool success;
public List<ListModel> data;
｝
#endregion
listLevelModel = JsonUtility.FromJson<ListLevelModel>(jsonlist);
四、LitJson
采用unity自带的解析方法时，在解析list时需要构筑一个带list的类，不能直接解析成list，而litjson可以如：
allComments = JsonMapper.ToObject<List<CommentElem>>(json);
也可以直接解析出所需要的参数，如下所示，可以直接获取到det下add的值
JsonData data = JsonMapper.ToObject(json); string str = data["Det"]["add"]
PS：如果xml需要跳过注释可用
if(temp is XmlComment)
｛
continue;
｝
来自：https://www.cnblogs.com/llstart-new0201/p/7102519.html