我遵循this tutorial，并按字面意思复制并粘贴了Countdown.h和Countdown.cpp的内容。
Visual Studio Code(我在Mac上)给出以下提示
#include errors detected. Please update your includePath. IntelliSense features for this translation unit (/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.h) will be provided by the Tag Parser.
cannot open source file "new" (dependency of "GameFramework/Actor.h")
在这条线
#include "GameFramework/Actor.h"
而我从UE得到的编译错误如下
Running Mono...
Setting up Mono
~/Documents/UE_4.18/Engine ~/Documents/UE_4.18/Engine/Binaries/Mac
Compiling game modules for hot reload
Parsing headers for HowTo_VTEEditor
Running UnrealHeaderTool "/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/HowTo_VTE.uproject" "/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Intermediate/Build/Mac/HowTo_VTEEditor/Development/HowTo_VTEEditor.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors -installed
Reflection code generated for HowTo_VTEEditor in 10,277899 seconds
Performing 3 actions (5 in parallel)
[2/3] Compile Countdown.cpp
[1/3] Compile Countdown.gen.cpp
In file included from /Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Intermediate/Build/Mac/UE4Editor/Inc/HowTo_VTE/Countdown.gen.cpp:8:
../../../Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.h:29:5: error: unknown type name 'UTextRenderComponent'
UTextRenderComponent* CountdownText;
^
../../../Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.h:12:5: error: cannot initialize return object of type 'UObject *' with an rvalue of type 'ACountdown *'
GENERATED_BODY()
^~~~~~~~~~~~~~~~
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:585:29: note: expanded from macro 'GENERATED_BODY'
#define GENERATED_BODY(...) BODY_MACRO_COMBINE(CURRENT_FILE_ID,_,__LINE__,_GENERATED_BODY);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:580:37: note: expanded from macro 'BODY_MACRO_COMBINE'
#define BODY_MACRO_COMBINE(A,B,C,D) BODY_MACRO_COMBINE_INNER(A,B,C,D)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:579:43: note: expanded from macro 'BODY_MACRO_COMBINE_INNER'
#define BODY_MACRO_COMBINE_INNER(A,B,C,D) A##B##C##D
^~~~~~~~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
../../../Unreal Projects/HowTo_VTE/Intermediate/Build/Mac/UE4Editor/Inc/HowTo_VTE/Countdown.generated.h:81:2: note: expanded from macro 'HowTo_VTE_Source_HowTo_VTE_Countdown_h_12_GENERATED_BODY'
HowTo_VTE_Source_HowTo_VTE_Countdown_h_12_ENHANCED_CONSTRUCTORS \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../Unreal Projects/HowTo_VTE/Intermediate/Build/Mac/UE4Editor/Inc/HowTo_VTE/Countdown.generated.h:57:54: note: expanded from macro 'HowTo_VTE_Source_HowTo_VTE_Countdown_h_12_ENHANCED_CONSTRUCTORS'
DECLARE_VTABLE_PTR_HELPER_CTOR(NO_API, ACountdown); \
^
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:1387:11: note: expanded from macro '\
DEFINE_VTABLE_PTR_HELPER_CTOR_CALLER'
return new (EC_InternalUseOnlyConstructor, (UObject*)GetTransientPackage(), NAME_None, RF_NeedLoad | RF_ClassDefaultObject | RF_TagGarbageTemp) TClass(Helper); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:1:
../../../Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.h:29:5: error: unknown type name 'UTextRenderComponent'
UTextRenderComponent* CountdownText;
^
../../../Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.h:12:5: error: cannot initialize return object of type 'UObject *' with an rvalue of type 'ACountdown *'
GENERATED_BODY()
^~~~~~~~~~~~~~~~
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:585:29: note: expanded from macro 'GENERATED_BODY'
#define GENERATED_BODY(...) BODY_MACRO_COMBINE(CURRENT_FILE_ID,_,__LINE__,_GENERATED_BODY);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:580:37: note: expanded from macro 'BODY_MACRO_COMBINE'
#define BODY_MACRO_COMBINE(A,B,C,D) BODY_MACRO_COMBINE_INNER(A,B,C,D)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:579:43: note: expanded from macro 'BODY_MACRO_COMBINE_INNER'
#define BODY_MACRO_COMBINE_INNER(A,B,C,D) A##B##C##D
^~~~~~~~~~
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
../../../Unreal Projects/HowTo_VTE/Intermediate/Build/Mac/UE4Editor/Inc/HowTo_VTE/Countdown.generated.h:81:2: note: expanded from macro 'HowTo_VTE_Source_HowTo_VTE_Countdown_h_12_GENERATED_BODY'
HowTo_VTE_Source_HowTo_VTE_Countdown_h_12_ENHANCED_CONSTRUCTORS \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../../Unreal Projects/HowTo_VTE/Intermediate/Build/Mac/UE4Editor/Inc/HowTo_VTE/Countdown.generated.h:57:54: note: expanded from macro 'HowTo_VTE_Source_HowTo_VTE_Countdown_h_12_ENHANCED_CONSTRUCTORS'
DECLARE_VTABLE_PTR_HELPER_CTOR(NO_API, ACountdown); \
^
Runtime/CoreUObject/Public/UObject/ObjectMacros.h:1387:11: note: expanded from macro '\
DEFINE_VTABLE_PTR_HELPER_CTOR_CALLER'
return new (EC_InternalUseOnlyConstructor, (UObject*)GetTransientPackage(), NAME_None, RF_NeedLoad | RF_ClassDefaultObject | RF_TagGarbageTemp) TClass(Helper); \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:11:44: error: use of undeclared identifier 'UTextRenderComponent'
CountdownText = CreateDefaultSubobject<UTextRenderComponent>(TEXT("CountdownNumber"));
^
/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:12:43: error: use of undeclared identifier 'EHTA_Center'; did you mean 'kTXNCenter'?
CountdownText->SetHorizontalAlignment(EHTA_Center);
^~~~~~~~~~~
kTXNCenter
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/Headers/MacTextEditor.h:793:3: note: 'kTXNCenter' declared here
kTXNCenter = 4,
^
/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:22:12: error: cannot initialize object parameter of type 'AActor' with an expression of type 'ACountdown'
Super::BeginPlay();
^~~~~~~~~
/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:25:5: error: cannot initialize object parameter of type 'const AActor' with an expression of type 'ACountdown'
GetWorldTimerManager().SetTimer(CountdownTimerHandle, this, &ACountdown::AdvanceTimer, 1.0f, true);
^~~~~~~~~~~~~~~~~~~~
/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:31:12: error: no matching member function for call to 'Tick'
Super::Tick( DeltaTime );
~~~~~~~^~~~
Runtime/Engine/Classes/GameFramework/Actor.h:2077:15: note: candidate function not viable: no known conversion from 'ACountdown' to 'AActor' for object argument
virtual void Tick( float DeltaSeconds );
^
Runtime/Engine/Classes/GameFramework/Actor.h:2432:15: note: candidate function not viable: requires 2 arguments, but 1 was provided
virtual void Tick( float DeltaTime, enum ELevelTick TickType ) final
^
/Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Source/HowTo_VTE/Countdown.cpp:47:9: error: cannot initialize object parameter of type 'const AActor' with an expression of type 'ACountdown'
GetWorldTimerManager().ClearTimer(CountdownTimerHandle);
^~~~~~~~~~~~~~~~~~~~
2 errors generated.
8 errors generated.
ERROR: UBT ERROR: Failed to produce item: /Users/massimobortolamei/Documents/Unreal Projects/HowTo_VTE/Binaries/Mac/UE4Editor-HowTo_VTE-6063.dylib
Total build time: 28,61 seconds (Local executor: 0,00 seconds)
好像这两个错误是相关的，但我不明白可能有什么错误。
我注意到，虽然我的项目位于
/Documents/Unreal Projects/HowTo_VTE/Source/HowToVTE/Countdown.cpp中虚幻的东西在
Documents/UE_4.18/Engine/...中这可能是找不到包含的罪魁祸首吗？
编辑:我尝试了包括与Actor.h的绝对路径，但我得到相同的编译错误
最佳答案
我在虚幻的Answerhub上发布了同样的问题，一个友善的用户能够提供解决方案。
你可以看到它here
简而言之:将#include "Runtime/Engine/Classes/Components/TextRenderComponent.h"添加到Countdown.h的include中(当然，最后保留自动生成的include)
关于c++ - 虚幻的: “Unknown type name UTextRenderComponent” compile error while following tutorial，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/47578891/