[游戏开发]UE4C++存档系统

本篇文章主要是做功能演示和教程 这为了方便所以使用按键输入进行操作
1.绑定输入按键 打开UE4项目设置->找到Input(输入)->绑定事件

2.创建C++ SaveGame类

3.在C++ SaveGame类内创建出需要的保存的变量

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/SaveGame.h"
#include "MySaveGame.generated.h"

/**
 * 
 */
UCLASS()
class FPS_API UMySaveGame : public USaveGame
{
	GENERATED_BODY()
	

public:

	UMySaveGame();

	UPROPERTY(EditAnywhere)
	FVector PlayerLoction;



};

CPP文件

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


#include "MySaveGame.h"

UMySaveGame::UMySaveGame()
{
	PlayerLoction = FVector(0.f, 0.f, 0.f);

}

4.在Character内创建两个函数 分别为保存函数和加载函数

5.在事件绑定内创建绑定事件

	PlayerInputComponent->BindAction("Save", IE_Pressed, this, &AfpSCharacter::SaveGame);
	PlayerInputComponent->BindAction("Load", IE_Pressed, this, &AfpSCharacter::LoadGame);

6.保存 加载功能

void AfpSCharacter::SaveGame()
{
	UMySaveGame * SaveGameInstance = Cast<UMySaveGame>(UGameplayStatics::CreateSaveGameObject(UMySaveGame::StaticClass()));

	SaveGameInstance->PlayerLoction = this->GetActorLocation();//设置保存位置
	
	UGameplayStatics::SaveGameToSlot(SaveGameInstance, TEXT("MySlot"),0);


	GEngine->AddOnScreenDebugMessage(-1,5, FColor::Green, TEXT("Game Saved"));

}

void AfpSCharacter::LoadGame()
{

	UMySaveGame * SaveGameInstance = Cast<UMySaveGame>(UGameplayStatics::CreateSaveGameObject(UMySaveGame::StaticClass()));

	SaveGameInstance =Cast<UMySaveGame>( UGameplayStatics::LoadGameFromSlot("MySlot", 0));

	this->SetActorLocation(SaveGameInstance->PlayerLoction); //更新位置

	GEngine->AddOnScreenDebugMessage(-1, 5, FColor::Green, TEXT("Load Game"));


}```


效果
![在这里插入图片描述](https://img-blog.csdnimg.cn/89523a68302b425babb8883000e93af9.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBARXpfY29kZXI=,size_20,color_FFFFFF,t_70,g_se,x_16)
![在这里插入图片描述](https://img-blog.csdnimg.cn/c903d053b25e4d1b9b338427865223ac.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBARXpfY29kZXI=,size_20,color_FFFFFF,t_70,g_se,x_16)

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