c++ - QThread - 没有这样的插槽

Question

定义ComSendCallToScreenThread继承自QThread:

class ComSendCallToScreenThread : public QThread 
{
    private slots:
        void readAnswer();
        void pauseSendingRequests();
};

void ComSendCallToScreenThread::run()
{
    connect(m_senderCom, SIGNAL(readyRead()), this, SLOT(readAnswer()));
    connect(m_senderCom, SIGNAL(readyRead()), this, SLOT(pauseSendingRequests()));
}

运行报错:

Object::connect: No such slot QThread::readAnswer() in ComSendCallToScreenThread.cpp:47
Object::connect: No such slot QThread::pauseSendingRequests() in ComSendCallToScreenThread.cpp:48

什么导致连接失败？

Answer 1

在类定义之后放置一个Q_OBJECT:

class ComSendCallToScreenThread : public QThread 
{
   Q_OBJECT

Qt4 documentation :

All classes that contain signals or slots must mention Q_OBJECT at the top of their declaration. They must also derive (directly or indirectly) from QObject.