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创建 C++ 蓝图函数库

如果项目是蓝图项目，需要先启用 C++ 支持（通过 “File > New C++ Class” 创建任意类，引擎会自动配置 C++ 环境）。

创建蓝图函数库

• 在 Content Browser 中右键 → “C++ Classes” → 选择你的项目 → 右键 → “New C++ Class”
• 父类选择 “Blueprint Function Library”，命名为 “FileOperationLibrary”

编写代码

.h头文件代码：

#pragma once#include "CoreMinimal.h"
#include "Kismet/BlueprintFunctionLibrary.h"
#include "FileOperationLibrary.generated.h"/****/
UCLASS()
class YourProject_API UFileOperationLibrary : public UBlueprintFunctionLibrary
{GENERATED_BODY()public:// 增强版头文件UFUNCTION(BlueprintCallable, Category = "File Management", meta = (DisplayName = "Delete File Safely", ToolTip = "Delete File Safely"))static bool DeleteFileSafely(const FString& FilePath, bool bShowNotification = true);
};

.cpp文件代码

#include "FileOperationLibrary.h"
#include "HAL/PlatformFileManager.h"// 增强版实现
bool UFileOperationLibrary::DeleteFileSafely(const FString& FilePath, bool bShowNotification)
{IPlatformFile& PlatformFile = FPlatformFileManager::Get().GetPlatformFile();if (!PlatformFile.FileExists(*FilePath)){if (bShowNotification){UE_LOG(LogTemp, Warning, TEXT("File does not exist: %s"), *FilePath);}return false;}bool bSuccess = PlatformFile.DeleteFile(*FilePath);if (bShowNotification){if (bSuccess){UE_LOG(LogTemp, Log, TEXT("Successfully deleted file: %s"), *FilePath);}else{UE_LOG(LogTemp, Error, TEXT("Failed to delete file: %s"), *FilePath);}}return bSuccess;
}

编译代码：点击 UE 工具栏的 “Compile” 按钮编译 C++ 代码。

在蓝图中使用刚创建的节点

正常传入文件路径就行。
如“C:/MyProject/Saves/OldSave.sav”