BlueprintReadWrite should not be used on private members

Development Programming & Scripting Blueprint
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1

Ok so I’m following the ever so helpful youtube basic programming guide:

I’m also on a mac. And when I try and build my project I get an error saying:

“BlueprintReadWrite should not be used on private members”

The line it refers to is in the header file for my pickup class seen below:

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

#pragma once

#include "GameFramework/Actor.h"
#include "Pickup.generated.h"

/**
 * 
 */
UCLASS()
class MY_GAME_API APickup : public AActor
{
	GENERATED_BODY()
	
    //this bool variable is active inside the editor; can edit in blueprint editor with the macro here.  True when able to be picked up, false otherwise
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category=Pickup);
    bool bIsActive();

Now I’m not sure if this is related but I’m also getting errors saying “UnrealHeaderTool failed for target [MY_GAME_NAME]…” and it ends with “…UnrealHeaderTool.manifest”

and

RocketBuild.sh failed with exit code 2.

Any help would be appreciated.

2

It says it’s missing the variable type in that line. Which variable would it be referring to?

3

Yeah I did, same issue though. The compiler is saying the issue is in the line with the UPROPERTY.

4

With GENERATED_BODY() by default all the variable is private, so you must add public: before it something like this

GENERATED_BODY()
public: 
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category=Pickup);
bool bIsActive;
1 Like
5

did you change your bool bIsActive(); to bool bIsActive;

6

You have a trailing semicolon after your UPROPERTY.

7

Ok so that was it. But now I’ve run into a series of other issues. That intro video to UE4 where the Pickup class is created is definitely outdated. Does anyone know where I can find amore updated version of that by any chance, maybe something that goes over the basics of all the classes, macros, etc?

8

In UPROPERTY(…) you can add the argument meta = (AllowPrivateAccess = "true") to allow access of private variables from blueprints. This will fix the “BlueprintReadWrite should not be used on private members”.

So in your code, it would be:

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category=Pickup, meta=(AllowPrivateAccess = "true"))
bool bIsActive;
3 Likes