虚幻4 创建选择资源的UI

这就是选择资源的界面。

const bool bAllowClear = true;TArray<const UClass*> AllowedClasses;AllowedClasses.Add(AssetClassName::StaticClass());FAssetData CurrentAssetData;TSharedPtr<SWidget> AssetPickerWidget =  PropertyCustomizationHelpers::MakeAssetPickerWithMenu(CurrentAssetData,bAllowClear,AllowedClasses,PropertyCustomizationHelpers::GetNewAssetFactoriesForClasses(AllowedClasses),FOnShouldFilterAsset(),FOnAssetSelected::CreateSP(this, &SUIParticleEditorWindow::OnAssetSelected),FSimpleDelegate::CreateSP(this, &SUIParticleEditorWindow::CloseMenu));