[游戏开发] LuaTable转string存读二进制文件

UE5和Unity通用此方案，只不过读写文件的接口略有不同，lua代码的处理是相同的。

下面两个方法是 LuaTable和字符串互相转换的代码

function XUtils.luaTableToString(tab, sp)sp = sp or ""local s = ""for k,v in pairs(tab) doif type(k) == "number" thenk = _strFormat("[%s]", k)endif type(v) == "table" thens = _strFormat("%s %s=%s,",s, k, XUtils.luaTableToString(v))elseif type(v) == "string" thens = _strFormat("%s %s='%s',",s, k, v)elses = _strFormat("%s %s=%s,",s, k, v)ends = _strFormat("%s%s",s,sp)endreturn _strFormat("{%s%s}",sp,s)
endfunction XUtils.stringToLuaTable(str)if string.isEmpty(str) thenreturn {}endlocal tablocal bSucc, _ = xpcall(function()tab = load( "return "..str )()end, __G__TRACKWARN__)if not bSucc thenreturn {}, falseendreturn tab
end

 获取UE5本地存储地址：

local function GetPath()local userId = GetLocalDataAvatarDID(BP_GameInstance_Inst)local filePath = UE.FPaths.ProjectSavedDir() .. string.format( "localdata_%s.bin", v~=0 and v or "def")return filePath 
end

 存储代码：_defData 是我想存的LuaTable对象，SaveStringToFile方法把字符串转二进制并存到目标路径文件里

local function SaveDef_()local filePath = GetPath()local str = XUtils.luaTableToString(_defData or {}, "\n")local ret = UE.FFileHelper.SaveStringToFile(str, filePath)
end

存储后的文件长这样子 

读取二进制存档，把二进制文件读成string，再把string解析成luaTable

local function Init_()local filePath = GetPath()if UE.FPaths.FileExists(filePath) thenlocal fileString = UE.FFileHelper.LoadFileToString(filePath)local luaTable = XUtils.stringToLuaTable(fileString)--拿到luaTable数据end
end

到此成功完成了