UE4 从类获取场景中的所有对象

static void GetAllActorsOfClass ( const UObject * WorldContextObject, TSubclassOf< AActor > ActorClass, TArray< AActor * > & OutActors )

//需要include的头文件
#include "Kismet/GameplayStatics.h"

//使用方法
TArray ArryActors;  
UGameplayStatics::GetAllActorsOfClass(GetWorld(), AActor::GetClass(), ArryActors);  
for (int32 i = 0; i < ArryActors.Num(); i++)  
{  
    Cast(ArryActors[i])->Message("succeed"));  
}  

//GetWorld
GEngine->GetWorld()