UE C++读写本地txt

三个简单实用功能：

1.读取本地txt内容为string
2.读取本地txt内容为string类型array
3.存储string类型array到本地txt

第一步

在目录下直接右键或者像图中一样构建c++类。(没有Public文件夹没事，建完就有了)

在这里我取名为BFL_ReadWrite

第二步

这里不要全复制，对比一下，保留自己新建类中原始内容，把这里多的粘贴进去，否则会出错。
打开后.h文件中写：

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once
#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "BFL_ReadWrite.generated.h"

UCLASS()
class YOUR_API UBFL_ReadWrite : public UBlueprintFunctionLibrary
{//这里是自己的项目名
	GENERATED_BODY()

		UFUNCTION(BlueprintCallable)
		static bool SaveTextArray(FString Directory, FString FileName, TArray<FString> TextArray, bool OverWrite);

		UFUNCTION(BlueprintCallable)
		static TArray<FString> Read2Array(FString Directory, FString FileName);

		UFUNCTION(BlueprintCallable)
		static FString Read2String(FString Directory, FString FileName);
};

.cpp文件中写：

// Fill out your copyright notice in the Description page of Project Settings.

#include "BFL_ReadWrite.h"
#include "HAL/PlatformFilemanager.h"
#include "Misc/FileHelper.h"

bool UBFL_ReadWrite::SaveTextArray(FString Directory, FString FileName, TArray<FString> TextArray, bool OverWrite)
{
	Directory += "//";
	Directory += FileName;

	if (!OverWrite) {
		if (FPlatformFileManager::Get().GetPlatformFile().FileExists(*Directory)) {
			return false;
		}
	}
	return FFileHelper::SaveStringArrayToFile(TextArray, *Directory);
}

TArray<FString> UBFL_ReadWrite::Read2Array(FString Directory, FString FileName)
{
	Directory += "//";
	Directory += FileName;
	TArray<FString> Result;
	
	FFileHelper::LoadFileToStringArray(Result, *Directory);
	
	return Result;
}

FString UBFL_ReadWrite::Read2String(FString Directory, FString FileName)
{
	Directory += "//";
	Directory += FileName;
	FString Result;

	FFileHelper::LoadFileToString(Result, *Directory);

	return Result;
}

编译完了就能在蓝图用了