UE4 根据后缀名进行文件遍历 读写ini文件

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有时候我们需要遍历文件夹下面的某种后缀名的文件，比如ini，然后读取。UE4已经帮我们写好了工具类，所以，我们调用就好了。

头文件引用： #include "FileManagerGeneric.h"

我做成了蓝图节点方便调用。

H：

/*** @param app      Node name* @param key      Key name* @param filename full filename*/UFUNCTION(BlueprintCallable, meta = (DisplayName = "Get Item Int", Keywords = "TCFunctionsLibrary sample"), Category = "TC Functions Library")static int GetItemInt(FString app, FString key, FString filename);/*** @param app      Node name* @param key      Key name* @param filename full filename*/UFUNCTION(BlueprintCallable, meta = (DisplayName = "Get Item Double", Keywords = "TC Functions Library"), Category = "TC Functions Library")static FString GetItemDouble(FString app, FString key, FString filename);/*** @param app      Node name* @param key      Key name* @param lpstring The string to write * @param filename full filename*/UFUNCTION(BlueprintCallable, meta = (DisplayName = "Set Item String", Keywords = "TC Functions Library"), Category = "TC Functions Library")static bool SetItemString(FString app, FString key, FString lpstring, FString filename);/*** @param Filename  The Name of Process ready to kill*/UFUNCTION(BlueprintCallable, meta = (DisplayName = "Kill Process By Name", Keywords = "TC Functions Library"), Category = "TC Functions Library")static bool KillProcess(FString Filename);UFUNCTION(BlueprintCallable, meta = (DisplayName = "List Files In Directory", Keywords = "TC Functions Library"), Category = "TC Functions Library")static TArray<FString> ListFilesInFolder(FString Directory,FString FilesSuffix);

CPP:

int UTCFunctionsLibraryBPLibrary::GetItemInt(FString app, FString key, FString filename)
{int Resualt;string str_app(TCHAR_TO_UTF8(*app));string str_key(TCHAR_TO_UTF8(*key));string str_filename(TCHAR_TO_UTF8(*filename));Resualt = GetPrivateProfileIntA(str_app.c_str(), str_key.c_str(), 0, str_filename.c_str());return Resualt;
}FString UTCFunctionsLibraryBPLibrary::GetItemDouble(FString app, FString key, FString filename)
{char temp[32];string str_app(TCHAR_TO_UTF8(*app));string str_key(TCHAR_TO_UTF8(*key));string str_filename(TCHAR_TO_UTF8(*filename));GetPrivateProfileStringA(str_app.c_str(), str_key.c_str(), 0, temp, 32, str_filename.c_str());return temp;
}bool UTCFunctionsLibraryBPLibrary::SetItemString(FString app, FString key, FString lpstring, FString filename)
{bool Result = true;string str_app(TCHAR_TO_UTF8(*app));string str_key(TCHAR_TO_UTF8(*key));string str_lpstring(TCHAR_TO_UTF8(*lpstring));string str_filename(TCHAR_TO_UTF8(*filename));WritePrivateProfileStringA(str_app.c_str(), str_key.c_str(), str_lpstring.c_str(), str_filename.c_str());return Result;
}TArray<FString> UTCFunctionsLibraryBPLibrary::ListFilesInFolder(FString Directory,FString FilesSuffix)
{TArray<FString> Files;FString GameRootDir = FPaths::GameDir();//这个目录是工程或打包后的根目录Files.Empty();GameRootDir = GameRootDir + Directory;if (FPaths::DirectoryExists(GameRootDir)){FString Path = GameRootDir + "*." + FilesSuffix;FFileManagerGeneric::Get().FindFiles(Files,*Path,true,false);for (int i = 0;i < Files.Num();i++){Files[i] = GameRootDir + Files[i];}}return Files;
}

ListFilesInFolder 函数返回的是文件名数组。包含全路径。起始路径默认的是根目录，比如想访问工程或者打包游戏后的config文件夹，遍历ini文件，第一个参数传“config/”，第二个参数传“ini”就好了。不加引号.

还有，读写ini不用使用windows的API 来解决，UE4提供了GConfig。哭 我开始居然忘了！直接

FString ValueReceived;
    GConfig->GetString(
        TEXT("/Script/Engine.WorldInfo"),
        TEXT("GlobalDefaultGameType"),
        ValueReceived,
        GGameIni
    );
就可以了。 GetInt，GetFloat，SetString道理一样。

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