Unreal Engine子类化系统UButton

发布于：2024-05-02 ⋅ 阅读:(21) ⋅ 点赞:(0)

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

// 设置按钮ID

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "VRVIU Button")

int32 ButtonID;

// 设置按钮扩展参数

UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "VRVIU Button")

FString AdditionalParameter;

点击事件中调用回调方法，传递扩展参数

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

void ALandMasterGameMode::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"));

}