日誌2017-05-26 20:46
[UE4]如何使用C++動態載入UMG與Slot基本概念作者：dorgon
| // Fill out your copyright notice in the Description page of Project Settings. | |
| UCLASS() | |
| class HOPETOWERDEFENSE_API AHopePlayerController : public APlayerController | |
| { | |
| //GENERATED_BODY() | |
| GENERATED_UCLASS_BODY() | |
| public: | |
| //AHopePlayerController(const FObjectInitializer& ObjectInitializer); | |
| virtual ~AHopePlayerController(); | |
| public: | |
| virtual void BeginPlay() override; | |
| UPROPERTY(EditDefaultsOnly, BlueprintReadOnly, Category = UI) | |
| TSubclassOf<UGameWidget> WidgetClass; | |
| UPROPERTY() | |
| UGameWidget* WidgetInstance; | |
| }; | |
| AHopePlayerController::AHopePlayerController(const FObjectInitializer& ObjectInitializer) | |
| : Super(ObjectInitializer) | |
| { | |
| //Must put in constructor | |
| ConstructorHelpers::FClassFinder<UGameWidget> PutNameHere(TEXT("/Game/MyUMG")); | |
| if (PutNameHere.Class) { | |
| WidgetClass = PutNameHere.Class; | |
| } | |
| } | |
| void AHopePlayerController::BeginPlay() | |
| { | |
| Super::BeginPlay(); | |
| if (WidgetClass) { | |
| if (!WidgetInstance) { | |
| WidgetInstance = CreateWidget<UGameWidget>(this, WidgetClass); | |
| UImage* image = NewObject<UImage>(UImage::StaticClass()); | |
| image->SetVisibility(ESlateVisibility::Visible); | |
| UPanelWidget* rootPanel = (UPanelWidget*)WidgetInstance->GetRootWidget(); | |
| //UPanelWidget* rootPanel = (UPanelWidget*)WidgetInstance->GetWidgetFromName(TEXT("RootCanvasPanel")); | |
| rootPanel->AddChild(image); | |
| UCanvasPanelSlot* canvasPanelSlot = (UCanvasPanelSlot*)image->Slot; | |
| auto slot = image->Slot; | |
| canvasPanelSlot->SetPosition(FVector2D(100, 100)); | |
| } | |
| } | |
| if (!WidgetInstance->GetIsVisible()) | |
| { | |
| WidgetInstance->AddToViewport(); | |
| } | |
| } | |
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