MFC使用多线程实现动画效果代码

以下是一个简单的MFC多线程实现动画效果的示例代码：

// MyThread.h
class MyThread : public CWinThread
{
	DECLARE_DYNCREATE(MyThread)

protected:
	MyThread();           // protected constructor used by dynamic creation
	virtual ~MyThread();

public:
	virtual BOOL InitInstance();
	virtual int ExitInstance();
	virtual int Run();

protected:
	DECLARE_MESSAGE_MAP()
	afx_msg void OnUpdateAnimation(WPARAM wParam, LPARAM lParam);
};

// MyThread.cpp
IMPLEMENT_DYNCREATE(MyThread, CWinThread)

MyThread::MyThread()
{
}

MyThread::~MyThread()
{
}

BOOL MyThread::InitInstance()
{
	// 初始化线程
	return TRUE;
}

int MyThread::ExitInstance()
{
	// 结束线程
	return CWinThread::ExitInstance();
}

int MyThread::Run()
{
	// 动画循环
	while (true)
	{
		// 执行动画逻辑
		Sleep(100); // 模拟动画效果

		// 发送消息通知主线程更新画面
		PostMessage(AfxGetMainWnd()->m_hWnd, WM_USER_UPDATE_ANIMATION, 0, 0);
	}

	return 0;
}

BEGIN_MESSAGE_MAP(MyThread, CWinThread)
	ON_MESSAGE(WM_USER_UPDATE_ANIMATION, OnUpdateAnimation)
END_MESSAGE_MAP()

void MyThread::OnUpdateAnimation(WPARAM wParam, LPARAM lParam)
{
	// 更新画面
	// ...

	CWinThread::OnUpdateAnimation(wParam, lParam);
}

// MainFrame.h
class CMainFrame : public CFrameWnd
{
protected: // create from serialization only
	CMainFrame();
	DECLARE_DYNCREATE(CMainFrame)

protected:
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
	afx_msg void OnTimer(UINT_PTR nIDEvent);
	DECLARE_MESSAGE_MAP()

private:
	MyThread* m_pThread;
};

// MainFrame.cpp
IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)

CMainFrame::CMainFrame()
{
}

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;

	// 创建线程
	m_pThread = (MyThread*)AfxBeginThread(RUNTIME_CLASS(MyThread), THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);
	m_pThread->m_bAutoDelete = FALSE;
	m_pThread->ResumeThread();

	// 设置定时器
	SetTimer(1, 100, NULL);

	return 0;
}

void CMainFrame::OnTimer(UINT_PTR nIDEvent)
{
	if (nIDEvent == 1)
	{
		// 发送更新消息
		m_pThread->PostThreadMessage(WM_USER_UPDATE_ANIMATION, 0, 0);
	}

	CFrameWnd::OnTimer(nIDEvent);
}

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
	ON_WM_CREATE()
	ON_WM_TIMER()
END_MESSAGE_MAP()

以上代码中，MyThread类是自定义的线程类，负责执行动画逻辑并更新画面。CMainFrame类是主窗口类，负责创建和管理线程，并定时向线程发送更新消息。在MyThread类中使用PostMessage函数向主线程发送更新消息，在CMainFrame类中使用PostThreadMessage函数向线程发送更新消息。在更新画面时需要注意线程同步问题，可以使用PostMessage函数向主线程发送更新消息，由主线程负责更新画面。