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获取鼠标位置所在的ActorAActor* AYourPlayerController::GetActorUnderMouse(){ float MouseX = 0.f; float MouseY = 0.f; if (!GetMousePosition(MouseX, MouseY)) { ret...

参考链接：https://docs.unrealengine.com/latest/INT/Programming/Assets/AsyncLoading/index.html  //官方文档https://wiki.unrealengine.com/TAssetPtr_and_Asynchronous_Asset_Loading      //官方维基百科，非常详细https://forums....

以特效为例

委托DECLARE_DYNAMIC_MULTICAST_DELEGATE_TwoParams(FPlayerControllerInputEvent, ETouchType::Type, Type, FVector2D, TouchLocation);DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FWorldClientBeginLoadingEvent,...

1：创建至少两个WidgetEquipmentIcon为要拖动的窗口UIItemSelectPanel为拖动的上级窗口2：在要拖动的窗口中，即EquipmentIcon可以使用SizeBox来约束拖动时的Widget大小也可以在组件Details里的SizeToContent自适应大小此Widget和上级Widget必须设为Visible函数重载OnMouseButtonDown和OnDragDe...

FCollisionObjectQueryParams QueryParams(ECollisionChannel::ECC_WorldStatic);UWorld* MyWorld = OwnerPtr_->GetWorld();FHitResult HitStatic;if (MyWorld->LineTraceSingleByObjectType(HitStatic,      ...

AActor* AFaithPlayerController::GetActorUnderMouse(){ float MouseX = 0.f; float MouseY = 0.f; if (!GetMousePosition(MouseX, MouseY)) { return nullptr;...