- UE系统Button点击事件无法传递参数，通过子类化系统Button添加自定义参数扩展实现Button点击事件参数传递
- 点击C++类文件夹，在右边的区域点击鼠标右键，在弹出的菜单中选择“新建C++类”
- 在弹出的菜单中选中“显示所有类”，选择Button作为父类, 点击“下一步”按钮
- 输入类名"UVRVIUButton"，选择工程目录作为新类的目标模块，点击“公共”选择器，点击“创建类”按钮
声明点击事件回调方法
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DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FOnVRVIUButtonClicked, int32, ButtonID, FString, AdditionalParameter);定义点击事件回调变量
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// 点击事件回调UPROPERTY(BlueprintAssignable, Category ="VRVIU Button")FOnVRVIUButtonClicked OnVRVIUButtonClicked;定义扩展参数变量
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// 设置按钮IDUPROPERTY(EditAnywhere, BlueprintReadWrite, Category ="VRVIU Button")int32 ButtonID;// 设置按钮扩展参数UPROPERTY(EditAnywhere, BlueprintReadWrite, Category ="VRVIU Button")FString AdditionalParameter;绑定按钮点击事件
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// 设置按钮点击事件绑定OnClicked.AddDynamic(this, &UVRVIUButton::HandleButtonClicked);点击事件中调用回调方法，传递扩展参数
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UE_LOG(LogTemp, Warning, TEXT("UVRVIUButton::HandleButtonClicked"));// 触发自定义按钮点击事件OnVRVIUButtonClicked.Broadcast(ButtonID, AdditionalParameter);调用者绑定回调事件
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Button->OnVRVIUButtonClicked.AddDynamic(this, &ALandMasterGameMode::OnButtonClicked);调用者实现回调事件，获取扩展参数
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voidALandMasterGameMode::OnButtonClicked(int32 ButtonID, FString AdditionalParameterr) {UE_LOG(LogTemp, Warning, TEXT("On Button Clicked roomId is %d, ipAdress is %s"), ButtonID, *AdditionalParameterr);this->IntranetIP = AdditionalParameterr;if(nullptr != CurrentWidget){UButton* btn = Cast<UButton>(CurrentWidget->GetWidgetFromName(TEXT("ConnectButton")));if(btn != nullptr){btn->OnClicked.Broadcast();}else{UE_LOG(LogTemp, Warning, TEXT("verticalBox is not find"));}}}