我在wxWidgets项目中的主框架在按下按钮时启动线程。我尝试从wxThread类的文档中使用this example,但是编译时出现错误。它说朋友班'没有成员名为''
||=== Build: Debug in WindowsDgpsGUI (compiler: GNU GCC Compiler) ===|
D:\WindowsDgpsGui\NavigationThread.cpp||In destructor 'virtual NavigationThread::~NavigationThread()':|
D:\WindowsDgpsGui\NavigationThread.cpp|82|error: 'class wxFrame' has no member named 'm_navigationThreadCS'|
D:\WindowsDgpsGui\NavigationThread.cpp|84|error: 'class wxFrame' has no member named 'm_navigationThread'|
||=== Build failed: 2 error(s), 0 warning(s) (0 minute(s), 1 second(s)) ===|
虽然我无法找到我做错了什么...... 这是我的主框架的代码:
class WindowsDgpsGUIFrame: public wxFrame
{
public:
WindowsDgpsGUIFrame(wxWindow* parent,wxWindowID id = -1);
virtual ~WindowsDgpsGUIFrame();
protected:
wxCriticalSection m_navigationThreadCS; //protects the m_navigationThread pointer
NavigationThread* m_navigationThread;
friend class NavigationThread;
}
该线程的标题:
class NavigationThread : public wxThread
{
public:
/** \name Constructor */
NavigationThread(wxFrame* parent, navigation_variables usedVariables);
/** \name Destructor */
virtual ~NavigationThread();
private:
virtual ExitCode Entry();
wxFrame* m_parent;
}
并且这发生错误的线程的析构函数:
NavigationThread::~NavigationThread()
{
wxCriticalSectionLocker enter(m_parent->m_navigationThreadCS);
m_parent->m_navigationThread = NULL;
//dtor
}
有谁知道我做错了什么?任何帮助表示赞赏。
'wxFrame'不包含这些成员,但'WindowsDgpsGUIFrame'。你可能会忘记'm_parent'的错误类型?它不应该是'WindowsDgpsGUIFrame * m_parent;'? – songyuanyao
'm_parent'是指向'wxFrame'实例的指针,它没有任何想要的成员:派生类'WindowsDgpsGUIFrame'有它们。为了访问成员变量,你可以使用'dynamic_cast'将'm_parent'强制转换为其子类型,或者将m_parent'声明为'WindowsDgpsGUIFrame *' – wasthishelpful