UFUNCTION宏、属性说明符和元数据说明符

//暴露我们的函数在蓝图中可调用
UFUNCTION(BlueprintCallable,Category ="MyFunction")
void PrintF1();

//纯函数定义BlueprintPure
UFUNCTION(BlueprintCallab1e,BlueprintPure,Category ="MyFunction")
bool PrintF2();

//BlueprintImplementableEvent在c++中声明，不能定义蓝图可重写(override)
//无返回值相当于事件
UFUNCTION(BlueprintImplementableEvent)
void Test1();

UFUNCTION(BlueprintImplementableEvent)
void Test11(const FString &MyString);

//有返回值相当于函数
UFUNCTION(BlueprintImplementableEvent)
int Test2();
UFUNCTION(BlueprintImplementableEvent)
int Test22(const FString& MyString);

BlueprintNativeEvent在C++中声明和实现蓝图可重载或者不重载

//无返回值相当于事件
UFUNCTION(BlueprintNativeEvent)
void TestA();
//注意：在cpp实现中要加入后缀_Implementation，不然过不了编译
void AMyPawn::TestA_Implementation()
{
//重载的话会调用的蓝图的实现
}

//.h定义
//有返回值相当于函数
UFUNCTION(BlueprintNativeEvent)
int TestB();
//.cpp实现
int AMyPawn::TestB_Implementation()
{
return 0;
}

//.h定义
//无返回值相当于事件
UFUNCTION(BlueprintNativeEvent)
void TestC(const FString& mystring);
//.cpp实现
void AMyPawn::TestC_Implementation(const FString& mystring)
{
}

//.h定义
//有返回值相当于函数
UFUNCTION(BlueprintNativeEvent)
int TestD(const FString& mystring);
//.cpp实现
int AMyPawn::TestD_Implementation(const FString& mystring)
{
return 0;
}

元数据说明符meta

UFUNCTION(BlueprintCallable,Category ="MyFunction"，meta=(DisplayName =“MyPrinttest"))
void Printtest();