虚幻引擎4 CPP：'AsShared'：不是'MyModule‘的成员

Question

我是C++公司的纽比，试图从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)，并坚持将OnClicked事件添加到SButton中，我从创建独立窗口插件开始添加一个按钮。

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)
        ]

    ];}

编译后UE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

，请帮帮忙，我不知道发生了什么，谢谢你的建议！

Answer 1

FAssistLibModule看起来像从IModuleInterface派生出来的，不是一个共享指针，所以您必须为OnClicked指定绑定的方法。

我认为用它代替

OnClicked(this, &FAssistLibModule::CollectBlueprintsButtonClicked)

使用

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

或

OnClicked_Raw(this, &FAssistLibModule::CollectBlueprintsButtonClicked)

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