c++ - 虚幻引擎 4 CPP : 'AsShared' : is not a member of 'MyModule'

Question

我是 C++ 的新手，正在尝试从 Unity3D 迁移到虚幻引擎 4。现在我正在尝试编写我的第一个插件(UI 插件和工具是我工作中非常重要的一部分)并坚持添加 OnClicked 事件到 SButton我从创建 Standalone Window 插件并添加一个按钮开始。

TSharedRef<SDockTab> FAssistLibModule::OnSpawnPluginTab(const FSpawnTabArgs& SpawnTabArgs)  {
FText WidgetText = FText::Format(
    LOCTEXT("WindowWidgetText", "Add code 111 222 to {0} in {1} to override this window's contents"),
    FText::FromString(TEXT("FAssistLibModule::OnSpawnPluginTab")),
    FText::FromString(TEXT("AssistLib.cpp"))
    );

FText ButtonLabel = FText::FromString("Button?");

return SNew(SDockTab)
    .TabRole(ETabRole::NomadTab)
    [
        // Put your tab content here!
        SNew(SVerticalBox)
        +SVerticalBox::Slot().VAlign(VAlign_Top)
        [
            SNew(STextBlock)
            .Text(WidgetText)
        ]
        +SVerticalBox::Slot().VAlign(VAlign_Top)
        [
            SNew(SButton)
            .Text(ButtonLabel)
            .OnClicked(this, &FAssistLibModule::CollectBlueprintsButtonClicked)
        ]

    ];}

在编译 UE 后给我这个错误

Info Compiling game modules for hot reload
Info Performing 2 actions (4 in parallel)
Info Module.MyModule.cpp
Info c:\program files (x86)\epic games\4.13\engine\source\runtime\core\public\delegates\DelegateSignatureImpl.inl(181): error C2039: 'AsShared': is not a member of 'FMyModuleModule'
Error D:\dev\repos\assist-lib-ue4\Plugins\MyModule\Source\MyModule\Public\MyModule.h(10) : note: see declaration of 'FMyModuleModule'
Info C:\Program Files (x86)\Epic Games\4.13\Engine\Source\Runtime\Slate\Public\Widgets\Input\SButton.h(54): note: see reference to function template instantiation 'TBaseDelegate<FReply> TBaseDelegate<FReply>::CreateSP<UserClass,>(UserClass *,FReply (__cdecl FMyModuleModule::* )(void))' being compiled
Info         with
Info         [
Info             UserClass=FMyModuleModule
Info         ]
Info C:\Program Files (x86)\Epic Games\4.13\Engine\Source\Runtime\Slate\Public\Widgets\Input\SButton.h(54): note: see reference to function template instantiation 'TBaseDelegate<FReply> TBaseDelegate<FReply>::CreateSP<UserClass,>(UserClass *,FReply (__cdecl FMyModuleModule::* )(void))' being compiled
Info         with
Info         [
Info             UserClass=FMyModuleModule
Info         ]
Error D:\dev\repos\assist-lib-ue4\Plugins\MyModule\Source\MyModule\Private\MyModule.cpp(89) : note: see reference to function template instantiation 'SButton::FArguments::WidgetArgsType &SButton::FArguments::OnClicked<FMyModuleModule>(UserClass *,FReply (__cdecl FMyModuleModule::* )(void))' being compiled
Info         with
Info         [
Info             UserClass=FMyModuleModule
Info         ]
Info c:\program files (x86)\epic games\4.13\engine\source\runtime\core\public\delegates\DelegateSignatureImpl.inl(181): error C2672: 'StaticCastSharedRef': no matching overloaded function found
Info c:\program files (x86)\epic games\4.13\engine\source\runtime\core\public\delegates\DelegateSignatureImpl.inl(181): error C2672: 'TBaseDelegate<FReply>::CreateSP': no matching overloaded function found
Info ERROR: UBT ERROR: Failed to produce item: D:\dev\repos\assist-lib-ue4\Plugins\MyModule\Binaries\Win64\UE4Editor-MyModule-6676.dll
Info Total build time: 46.77 seconds

请帮忙，我不明白发生了什么，感谢您的任何建议!

Answer 1

FAssistLibModule 看起来像派生自 IModuleInterface 而不是共享指针，因此您必须指定要为 OnClicked 绑定(bind)的方法。

我认为替换是正确的

OnClicked(这，&FAssistLibModule::CollectBlueprintsButtonClicked)

与

OnClicked(FOnClicked::CreateRaw(this, &FAssistLibModule::CollectBlueprintsButtonClicked))

或

OnClicked_Raw(这，&FAssistLibModule::CollectBlueprintsButtonClicked)

检查这个线程，我认为它很有用:https://forums.unrealengine.com/showthread.php?78289-Slate-button-causes-the-editor-to-hang-when-instantiated&p=343287&viewfull=1#post343287