Questions about UE4 Programming

Development Programming & Scripting
1

I am a programmer for a long time and i was following the official programming tutorials.I was writing pickup class and of course it didn’t work.

These are questions that i just want to be sure. Because last time i did without being sure. UE got crashed everytime i opened project.

Q1
Says TSubobjectPtr is deprecated and c++11 smart pointers doesnt works on every platform. And i should use raw pointers.(Not sure if i got right)
If so where should i delete the pointer? I found this BeginDestroy() function. Will it do?

Q2

UFUNCTION(BlueprintNativeEvent)
void OnPickedUp();
// Says i should declare it for future versions here because UHT wont auto generate anymore 
virtual void OnPickedUp_Implementation();

Not something i should worry at the moment but should i use another UFUNCTION() macro for that?

Q3
Says i need to use FObjectInitializer. Is usage like this

APickUp::APickUp(const class FObjectInitializer& ObjectInitializer)
:Super(ObjectInitializer)
....
....

I just got confused between the tutorial and the changes that happened.

Thanks in advance.

2

Q2: maybe this helps you https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Reference/Functions/index.html

Q3:
(const class FPostConstructInitializeProperties& PCIP)
: Super(PCIP) was replaced by (const class FObjectInitializer& ObjectInitializer)
:Super(ObjectInitializer)

as far as i know

3

Thank you for the answer.

4

Q1: As far as I know, instead of TSubObjectPtr you now use:

//in your .h file
UPROPERTY()
class USomeComponent* SomeComponentPointer;

//in your .cpp file constructor
SomeComponentPointer = CreateDefaultSubobject<USomeComponent>(TEXT("SomeComponentPointer "));
5

Actually, when playing around with example code projects. I found out that raw pointers are not deleted.

Probably because FObjectInitializer class takes control of that pointer when we initialize it and deletes it when time comes.

Just a theory but i belive it has a very high possibility. Have to check it out.