文件和文件夹相关操作

读文件：

IPlatformFile& file =FPlatformFileManager::Get().GetPlatformFile();

//获取游戏路径

FString gameRootDir =FPaths::ConvertRelativePathToFull(FPaths::RootDir());

FString absolutePath =gameRootDir + TEXT(“config.ini”);

FString fileContent;

//读取文件内容到FString

if(FFileHelper::LoadFileToString(fileContent, *absolutePath))

{

    //判断字符串是否是数字形式

    if(fileContent.IsNumeric())

    {

        //字符串转浮点数

        speed= FCString::Atof(*fileContent);

        returntrue;

    }

}

写文件：

IPlatformFile& file =FPlatformFileManager::Get().GetPlatformFile();

FString gameRootDir =FPaths::ConvertRelativePathToFull(FPaths::RootDir());

m_statisticsDir = gameRootDir + “Statistic/”;

FString macAddr =FGenericPlatformMisc::GetMacAddressString();

FString absolutePath = m_statisticsDir + macAddr +TEXT(“.log”);

if (!file.DirectoryExists(*m_statisticsDir))

{

file.CreateDirectory(*m_statisticsDir);

}

//创建文件

IFileHandle* m_filehandle;

m_filehandle = file.OpenWrite(*absolutePath, true);

 

//获取时间

FString timestamp = FDateTime::Now().ToString();

const static TCHAR* endline = TEXT(“\r\n”);

const static TCHAR* space = TEXT(” “);

 

//写文件

//字符串编码格式转换

m_filehandle->Write((constuint8*)TCHAR_TO_ANSI(*timestamp),FCStringAnsi::Strlen(TCHAR_TO_ANSI(*timestamp)));

m_filehandle->Write((constuint8*)TCHAR_TO_ANSI(space), FCStringAnsi::Strlen(TCHAR_TO_ANSI(space)));

m_filehandle->Write((constuint8*)TCHAR_TO_ANSI(log), FCStringAnsi::Strlen(TCHAR_TO_ANSI(log)));

m_filehandle->Write((constuint8*)TCHAR_TO_ANSI(endline), FCStringAnsi::Strlen(TCHAR_TO_ANSI(endline)));

目录判断

IPlatformFile& file =FPlatformFileManager::Get().GetPlatformFile();

FString gameRootDir =FPaths::ConvertRelativePathToFull(FPaths::RootDir());

FString licenceDir = gameRootDir+ “licence/”;

FString macAddr =FString(machineID).Right(12);//FGenericPlatformMisc::GetMacAddressString();

FString absolutePath = licenceDir+ macAddr + TEXT(“.id”);

//make sure the dir exist

//判断目录

if(!file.DirectoryExists(*licenceDir))

{

//创建目录

file.CreateDirectory(*licenceDir);

}