聲明部分:如何從Qt中的工作線程類啓動計時器? Controller類的
class ProtocolPacket: public QQuickItem
{
private:
Q_OBJECT
...
QThread objWorkerThread;
public:
ProtocolPacket();
~ProtocolPacket();
...
控制器類的構造函數:
ProtocolPacket::ProtocolPacket()
{
ReadWriteSerialPort *objReadWriteSerialPort = new ReadWriteSerialPort;
objReadWriteSerialPort->moveToThread(&objWorkerThread);
connect(&objWorkerThread, &QThread::finished,
objReadWriteSerialPort, &QObject::deleteLater);
/// Following signals of ProtocolPacket class are connected to the corresponding
/// slots of thread class ReadWriteSerialPort.
connect(this, &ProtocolPacket::cameraValueChanged,
objReadWriteSerialPort, &ReadWriteSerialPort::receiveAndSendUpdatedCameraValue);
...
...
objWorkerThread.start();
}
工作線程類的構造函數:
ReadWriteSerialPort::ReadWriteSerialPort()
{
...
serialPort.setPortName ("/dev/ttyUSB0");
serialPort.setBaudRate (QSerialPort::Baud19200);
if(serialPort.open (QIODevice::ReadWrite))
{
serialPort.setDataBits(QSerialPort::Data8);
serialPort.setParity(QSerialPort::NoParity);
serialPort.setStopBits(QSerialPort::OneStop);
}
objWriter = new SerialPortWriter(&serialPort);
objReader = new SerialPortReader(&serialPort);
timerSendVelocityPackets = new QTimer(this);
connect (timerSendVelocityPackets, SIGNAL (timeout()),
this, SLOT (sendVelocityPacket()));
timerSendHealthFeedbackPackets = new QTimer(this);
connect (timerSendHealthFeedbackPackets, SIGNAL (timeout()),
this, SLOT (formAndSendHealthFeedbackPackets()));
timerReceivePackets = new QTimer (this);
connect (timerReceivePackets, SIGNAL (timeout()),
this, SLOT (receiveAndUnpackPacket()));
timerReceivePackets->start (300);
}
我receivi納克錯誤:
QObject::startTimer: Timers cannot be started from another thread
我在做什麼錯?
我要開始從工人階級定時器:ReadWriteSerialPort
QThread的構造函數在調用線程中運行,而不是QThread實例所屬的線程。所以你必須在啓動你的工作線程後在其他地方啓動你的計時器。 –
請在解答中更詳細地解釋您的評論和解決方案。 @KarstenKoop –
評論是不正確的。 –