Post Edit Change Property 从子类修改父类的变量属性（UPROPERTY）

例如，限制输入框的最小值

.h

UCLASS() 
class MYPILOTPROJECT_API UMyScrollBox : public UScrollBox 
{  
    GENERATED_BODY() 
public: 
    UMyScrollBox(); 
 

    //***重写PostEditChangeProperty，可以修改父类的变量的UPEOPERTY属性****
    virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)override; 

};

_________________________________________________________

.cpp

void UMyScrollBox::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) 
{  
    Super::PostEditChangeProperty(PropertyChangedEvent); 

    ScrollbarThickness = FVector2D 
    ( 
     UKismetMathLibrary::Clamp(ScrollbarThickness.X, 2.0f, INT32_MAX), 
     UKismetMathLibrary::Clamp(ScrollbarThickness.X, 2.0f, INT32_MAX) 
    ); 
}