我有一个主Qt应用程序,我正在开发一个Qt库,我从这个主应用程序链接到。从主应用程序我希望调用库中的一个函数来执行某些操作,然后在例程的末尾调用一个QTimer,它将在一段延迟后触发库代码中的Slot。我不能让计时器开火,我不知道为什么。如果我在我的主应用程序中放置一个计时器,它会按预期启动,而不是在库中。
现在,我的图书馆只是一个班级。在我的库头文件中,我将要调用的插槽定义为:
private slots:
void stop();
在实现文件中我有:
void MyLib::start() {
// Create a timer to user during audio operation
m_GeneralTimer = new QTimer(this);
// Fire off a oneshot to clear the buffer for fluke-media
m_GeneralTimer->setInterval(3000);
m_GeneralTimer->setSingleShot(true);
connect(m_GeneralTimer, SIGNAL(timeout()), SLOT(stop()));
m_GeneralTimer->start();
}
void MyLib::stop() {
qDebug() << "Called stop()...";
m_GeneralTimer->stop();
delete m_GeneralTimer;
}
我在这里错过了什么让计时器开火?
注意:这里有很多我的头文件 - 真实文件中的所有内容都只是函数调用:
/// Use shared memory
#include <QSharedMemory>
/// Normal Qt Includes
#include <QBuffer>
#include <QDebug>
/// QTimer is required for calling a method
/// to stop audio playback at a later time
#include <QTimer>
/// Put into a background thread
#include <QtConcurrentRun>
/// Check integrity of received data
#include <QCryptographicHash>
class MYAUDIOLIBSHARED_EXPORT MyLib: public QObject
{
Q_OBJECT
public:
/// /// ///
private slots:
void stop();
/// /// ///
}
答案 0 :(得分:1)
以下代码有效。我在start()函数中放了3秒钟,现在它从库调用中激活。
// Create a timer to fire a slot when the playback is done
m_EndPlayBackTimer = new QTimer(this);
m_EndPlayBackTimer->setInterval(3000);
m_EndPlayBackTimer->setSingleShot(true);
connect(m_EndPlayBackTimer, SIGNAL(timeout()), SLOT(playBackDone()));
m_EndPlayBackTimer->start(3000);
// Done
return;
}
/**
* @brief
* Slot to be started by a timer after some time delay
* to signify that the playback is complete.
*
*/
void MyLib::playBackDone() {
#if DEBUG
qDebug() << "Playback is complete...";
#endif
}