QThread线程使用

笔者一般使用QThread线程都是以继承的方式

#ifndef BaseThread_H#define BaseThread_H#include <QThread>#include <QtDebug>#include <QMutex>class BaseThread : public QThread{    Q_OBJECTpublic:    explicit BaseThread(QObject *parent = 0);    virtual ~BaseThread();    //错误返回    static QString lastError();    static void setLastError(const QString &lastError);    //定义线程需要执行任务类型    int threadType() const;    void setThreadType(int threadType);    //返回结果可以自己定义返回值    int result() const;    void setResult(int result);    //是否需要中途跳出线程    void setNeedStop(bool isNeedStop);    bool isNeedStop() const;    //停止线程    void stopThread();signals:    //线程输出    void sigThreadOut(int threadType);public slots:private:    //线程类型    int _threadType = 0;    //线程返回0为正常返回    int _result = 0;    //是否停止线程，该变量用于跳出while(!_isNeedStop)循环    bool _isNeedStop = false;    //最后错误信息    static QString _lastError;    //线程锁，注意return函数中记得解锁    QMutex _mutex;};#endif // BaseThread_H

#include "BaseThread.h"QString BaseThread::_lastError = "";BaseThread::BaseThread(QObject *parent) : QThread(parent){}BaseThread::~BaseThread(){//    qDebug()<<"~BaseThread()";}void BaseThread::stopThread(){    setNeedStop(true);    this->quit();    this->wait();}bool BaseThread::isNeedStop() const{    return _isNeedStop;}void BaseThread::setNeedStop(bool isNeedStop){    _isNeedStop = isNeedStop;}QString BaseThread::lastError(){    return _lastError;}void BaseThread::setLastError(const QString &lastError){    _lastError = lastError;}int BaseThread::threadType() const{    return _threadType;}void BaseThread::setThreadType(int threadType){    _threadType = threadType;}int BaseThread::result() const{    return _result;}void BaseThread::setResult(int result){    _result = result;}

使用方式

这里写代码片