QThread

QThread

 

Header:	#include <QThread>
qmake:	QT += core
Inherits:	QObject

 

 

 

 

 

Public Types

enum	Priority { IdlePriority, LowestPriority, LowPriority, NormalPriority, ..., InheritPriority }

 

Public Functions

	QThread(QObject *parent = nullptr)
virtual	~QThread()
QAbstractEventDispatcher *	eventDispatcher() const
void	exit(int returnCode = 0)
bool	isFinished() const
bool	isInterruptionRequested() const
bool	isRunning() const
int	loopLevel() const
QThread::Priority	priority() const
void	requestInterruption()
void	setEventDispatcher(QAbstractEventDispatcher *eventDispatcher)
void	setPriority(QThread::Priority priority)
void	setStackSize(uint stackSize)
uint	stackSize() const
bool	wait(unsigned long time = ULONG_MAX)

 

 

 

 

 

 

 

 

 

 

 

 

Reimplemented Public Functions

virtual bool

event(QEvent *event) override

 

 

32 public functions inherited from QObject

 

Public Slots

void	quit()
void	start(QThread::Priority priority = InheritPriority)
void	terminate()

 

 

 

 

1 public slot inherited from QObject

 

Signals

void	finished()
void	started()

 

 

 

2 signals inherited from QObject

 

Static Public Members

QThread *	create(Function &&f, Args &&... args)
QThread *	create(Function &&f)
QThread *	currentThread()
Qt::HANDLE	currentThreadId()
int	idealThreadCount()
void	msleep(unsigned long msecs)
void	sleep(unsigned long secs)
void	usleep(unsigned long usecs)
void	yieldCurrentThread()

 

 

 

 

 

 

 

 

 

 

 

11 static public members inherited from QObject

 

Protected Functions

int	exec()
virtual void	run()

 

 

 

9 protected functions inherited from QObject

Static Protected Members

void	setTerminationEnabled(bool enabled = true)

 

 

Additional Inherited Members

• 1 property inherited from QObject

Detailed Description

QThread类提供了一种独立于平台的方式来管理线程。

QThread对象管理程序中的一个控制线程。QThreads开始在run（）中执行。默认情况下，run（）通过调用exec（）启动事件循环，并在线程内运行Qt事件循环。

通过使用QObject:：moveToThread（）将辅助对象移动到线程，可以使用辅助对象。

 

 

class Worker : public QObject
  {
      Q_OBJECT

  public slots:
      void doWork(const QString &parameter) {
          QString result;
          /* ... here is the expensive or blocking operation ... */
          emit resultReady(result);
      }

  signals:
      void resultReady(const QString &result);
  };

  class Controller : public QObject
  {
      Q_OBJECT
      QThread workerThread;
  public:
      Controller() {
          Worker *worker = new Worker;
          worker->moveToThread(&workerThread);
          connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);
          connect(this, &Controller::operate, worker, &Worker::doWork);
          connect(worker, &Worker::resultReady, this, &Controller::handleResults);
          workerThread.start();
      }
      ~Controller() {
          workerThread.quit();
          workerThread.wait();
      }
  public slots:
      void handleResults(const QString &);
  signals:
      void operate(const QString &);
  };

 

 

 

 

QThread停止线程的方法：

workerThread.quit();
workerThread.wait();

 

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