QThread -无此类插槽

Question

从QThread继承的已定义ComSendCallToScreenThread：

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()));
}

报告运行错误时：

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

连接失败的原因是什么？

Answer 1

将Q_OBJECT放在类定义后面：

class ComSendCallToScreenThread : public QThread 
{
   Q_OBJECT

Qt4 documentation

所有包含信号或槽的类必须在其声明的顶部提到Q_OBJECT。它们还必须(直接或间接)从QObject派生。