UE4操作文件执行，读写，以及增删改查

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UE4对本地文件的操作

首先是文件的读写

.h

    UFUNCTION(BlueprintCallable, Category = "File operation")
        static FString ReadStringToFile(FString Dir);

    UFUNCTION(BlueprintCallable, Category = "File operation")
        static void WriteStringToFile(FString FileName, FString content);

.cpp

FString ACPP_Test::ReadStringToFile(FString Dir)
{
    FString Result;
    FFileHelper::LoadFileToString(Result, *Dir);
    return Result;
}

void ACPP_Test::WriteStringToFile(FString FileName, FString content)
{
    FFileHelper::SaveStringToFile(content, *FileName);
}

查找文件或者文件夹

#include "Runtime/Core/Public/HAL/FileManagerGeneric.h"

.h

    UFUNCTION(BlueprintCallable, Category = "File operation")
        static TArray<FString> FindFiles(FString Path, FString Filter, bool Files, bool Directory);

.cpp

TArray<FString> ACPP_Test::FindFiles(FString Path, FString Filter, bool Files, bool Directory)
{
    TArray<FString> FilePathList;
    FilePathList.Empty();    
    FFileManagerGeneric::Get().FindFilesRecursive(FilePathList, *Path, *Filter, Files, Directory);
    return FilePathList;
}

指定文件移动到某处(修改文件路径)

#include "Runtime/Core/Public/HAL/FileManagerGeneric.h"

.h

    UFUNCTION(BlueprintCallable, Category = "File operation")
        static bool MoveFileTo(FString To, FString From);

.cpp

bool ACPP_Test::MoveFileTo(FString To, FString From)
{
    return IFileManager::Get().Move(*To, *From);
}

删除指定文件

#include "Runtime/Core/Public/HAL/FileManagerGeneric.h"

.h

UFUNCTION(BlueprintCallable, Category = "File operation")
        static bool DeleteFile(FString FilePath);

.cpp

bool ACPP_Test::DeleteFile(FString FilePath)
{
    return IFileManager::Get().Delete(*FilePath);
}

打开指定文件

#include "Runtime/Core/Public/HAL/FileManagerGeneric.h"

.h

    UFUNCTION(BlueprintCallable, Category = "File operation")
        static void   OpenFile(FString FilePath);

.cpp

void ACPP_Test::OpenFile(FString FilePath)
{
    FPlatformProcess::CreateProc(*FilePath, nullptr, true, false, false, nullptr, 0, nullptr, nullptr);
}

创建文件夹

.h

    UFUNCTION(BlueprintCallable, Category = "File operation")
        static void CreateDic(FString filePath);

.cpp

void ACPP_Test::CreateDic(FString filePath)
{
    IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
    PlatformFile.CreateDirectory(*filePath);
}

删除文件夹

.h

UFUNCTION(BlueprintCallable, Category = "File operation")
        static void DeleteDic(FString filePath);

.cpp

void ACPP_Test::DeleteDic(FString filePath)
{
    IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();
    PlatformFile.DeleteDirectory(*filePath);
}