MFC做的图像处理，线程函数那总报错，急！

Question

工作线程调用类的成员函数，总是出现大红叉的那个提示，为什么？代码如下：//控制函数，定义线程
static UINT Thread_FatigueAlarm(LPVOID pParam)
{
CUsepicoptdllView* p_usepicoptdllview = (CUsepicoptdllView*)pParam;
if((p_usepicoptdllview == NULL) || (!p_usepicoptdllview-                  >IsKindOf(RUNTIME_CLASS(CUsepicoptdllView))))
{
AfxMessageBox("参数传入失败，退出线程");
return 1;
}p_usepicoptdllview->OnPicBinary();
/*int globalCounter;
globalCounter++;
if(globalCounter > 9999)
globalCounter = 0;
*/
Sleep(1000);
return UINT(0);
}void CUsepicoptdllView::OnFatigueAlarmRun()
{
CUsepicoptdllView *pObject = new CUsepicoptdllView();  //创建对象
m_pThread = new CWinThread();                          //创建线程
m_pThread->m_bAutoDelete = false;                 
m_pThread = AfxBeginThread(Thread_FatigueAlarm,pObject); //创建工作者线程
if(m_pThread != NULL)  
MessageBox("线程调用成功");
}主要是一调用p_usepicoptdllview->OnPicBinary();这个函数就出错，程序没有走到OnPicBinary()函数里面。thread线程图像处理

Answer 1

线程函数不要直接调用，给View PostMessage来处理UI

Answer 2

能不能说清楚点，我刚刚工作，还不太懂MFC的机制，怎么交给View PostMessage来处理？

Answer 3

p_usepicoptdllview->OnPicBinary();
->
p_usepicoptdllview->PostMessage(WM_PIC);CUsepicoptdllView里响应这个自定义消息
LRESULT CUsepicoptdllView::OnPic(WPARAM wparam,LPAEAM lparam)
{
 OnPicBinary();
}
SendMessage也可以

Answer 4

你这种操作方式有一定风险。建议用SendMessage或者PostMessage来触发主窗体OnPicBinary();

Answer 5

不行啊，我用了PostMessage，还是那个错误，代码如下：
//控制函数
static UINT Thread_FatigueAlarm(LPVOID pParam)
{
CUsepicoptdllView* p_usepicoptdllview = (CUsepicoptdllView*)pParam;
if((p_usepicoptdllview == NULL) || (!p_usepicoptdllview->IsKindOf(RUNTIME_CLASS(CUsepicoptdllView))))
{
AfxMessageBox("参数传入失败，准备退出线程");
return 1;
}
    //if(p_usepicoptdllview->InitInstance())
// p_usepicoptdllview->OnPicBinary();
p_usepicoptdllview->PostMessage(WM_PIC);
/*int globalCounter;
globalCounter++;
if(globalCounter > 9999)
globalCounter = 0;
*/
Sleep(1000);
return UINT(0);
}
//运行
void CUsepicoptdllView::OnFatigueAlarmRun()
{
CUsepicoptdllView *pObject = new CUsepicoptdllView();  //创建对象
m_pThread = new CWinThread();                          //创建线程
//m_pThread->CreateThread();
m_pThread->m_bAutoDelete = false;                     
m_pThread = AfxBeginThread(Thread_FatigueAlarm,pObject); //启动线程
if(m_pThread != NULL)  
MessageBox("启动线程成功");
else{
AfxMessageBox("创建发送线程失败");
}
}
//停止
void CUsepicoptdllView::OnFatigueAlarmEnd()
{
    return;
}
//消息响应函数
LRESULT CUsepicoptdllView::OnPic(WPARAM wparam,LPARAM lparam)
{
    OnPicBinary();
return LRESULT(TRUE);
}

Answer 6

void CUsepicoptdllView::OnFatigueAlarmRun()
{
m_pThread = new CWinThread();                          //创建线程
//m_pThread->CreateThread();
m_pThread->m_bAutoDelete = false;                     
m_pThread = AfxBeginThread(Thread_FatigueAlarm,this); //启动线程
if(m_pThread != NULL)  
MessageBox("启动线程成功");
else{
AfxMessageBox("创建发送线程失败");
}
}

Answer 7

工作线程是不能调用MFC主线程里的函数的。把你要调用的函数做成一个消息发送到主线程，再由主线程调用