QThrad通过信号和槽建立2个线程，但随机的只有一个成功

[gell-lee]

class workTread : public QThread
{
	Q_OBJECT
	void run() Q_DECL_OVERRIDE
	{
		unsigned int arg;
		/* ... here is the expensive or blocking operation ... */
		emit resultReady(arg);
		exec();
	}

signals:
	void resultReady(unsigned int arg);
}; 
class onDataRecvSoap；
 class dataService :QObject
{
	//Q_OBJECT
public:
	dataService();
	~dataService();
	virtual void OnData(ns1__DataNotification *ns1__DataNotification_);
	
public slots:
	void doTask(unsigned int arg);

private:
	onDataRecvSoap	m_onDataRecv;
	workTread		*m_dataServiceThread;
};

dataService::dataService()
{
	//创建 m_dataServiceThread
	m_dataServiceThread = new workTread();
	connect(m_dataServiceThread, &workTread::resultReady, this, &dataService::dataServiceTask);
	connect(m_dataServiceThread, &workTread::finished, m_dataServiceThread, &QObject::deleteLater);
	

	//创建m_onDataThread
	m_onDataThread = new workTread();
	connect(m_onDataThread, &workTread::resultReady, this, &dataService::onDataTask);
	connect(m_onDataThread, &workTread::finished, m_onDataThread, &QObject::deleteLater);
	
	m_dataServiceThread->start();
	m_onDataThread->start();
}

dataService::~dataService()
{
	delete m_dataServiceThread;
	delete m_onDataThread;
}

void dataService::OnData(ns1__DataNotification *ns1__DataNotification_)
{

}

void dataService::dataServiceTask(unsigned int arg)
{
	while (true)
	{
		Sleep(2000);
		std::cout << "dataServiceTask" << std::endl;
	}
}

void dataService::onDataTask(unsigned int arg)
{
	while (true)
	{
		Sleep(2000);
		std::cout << "onDataTask" << std::endl;
	}
}
Main里面
dataService

代码如上所述， 每次运行想建立2个线程，但都是随机onDataTask， dataServiceTask 每次都只调用一个。

[雲天之巔]

void dataService::dataServiceTask(unsigned int arg) { while (true) { Sleep(2000); std::cout << "dataServiceTask" << std::endl; } } 你这里的槽函数是在主线程运行的，你这样把主线程阻塞了，另一个线程发来的信号后，槽函数没法运行了。。，

[别逗我乐]

你的信号槽的while循环，是在主线程中，一旦一个信号被槽函数接收，就是无限循环，主线程就被阻塞了，所以无法响应后续的信号。楼主应该把while循环放到各个线程中， 就是两个线程类 class workTread : public QThread1， class workTread : public QThread2 而不是在dataService中 http://www.cnblogs.com/vegetable/p/6648609.html 也可以使用QObject::moveToThread()创建线程