QThread: Destroyed while thread is still running | 错误123

简介:

在QT开发中使用QThread多线程，线程没正常释放导致错误: “QThread: Destroyed while thread is still running”。

环境:

系统: Microsoft Windows [版本 6.1.7601] (Windows 7 旗舰版64位)
QT:
Qt Creator 4.3.1
Based on Qt 5.9.0 (MSVC 2015, 32 bit)Built on May 28 2017 21:47:46

错误:

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QThread: Destroyed while thread is still running This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information.

 

操作:

1. 继承QThread作为子线程:

类: parentThread001

1	parentThread001

parentthread001.h:

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#ifndef PARENTTHREAD001_H #define PARENTTHREAD001_H #include <QThread> class parentThread001 : public QThread {     Q_OBJECT public:     explicit parentThread001(QObject *parent = Q_NULLPTR);     ~parentThread001(); protected:     void run(); }; #endif // PARENTTHREAD001_H

parentthread001.cpp:

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#include "parentthread001.h" #ifdef QT_DEBUG #include <QDebug> #endif parentThread001::parentThread001(QObject *parent)             :QThread(parent) { } parentThread001::~parentThread001() { } void parentThread001::run() {     while (true)     { #ifdef QT_DEBUG         qDebug()<<"parentThread001::run: pid="<<QThread::currentThreadId()<<endl; #endif         //         this->msleep(100);     } }

 

 2. 使用moveToThread方式作为子线程:

类: moveThread001

movethread001.h:

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#ifndef MOVETHREAD001_H #define MOVETHREAD001_H #include <QObject> class  QThread; class moveThread001 : public QObject {     Q_OBJECT public:     explicit moveThread001(QObject *parent = nullptr);     ~moveThread001(); signals: public slots:     void onTest(); protected:     QThread *m_td; }; #endif // MOVETHREAD001_H

movethread001.cpp:

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#include "movethread001.h" #include <QThread> #ifdef QT_DEBUG #include <QDebug> #endif moveThread001::moveThread001(QObject *parent) : QObject(parent) {     this->m_td = new QThread();     this->moveToThread(this->m_td);     this->m_td->start(); } moveThread001::~moveThread001() {     delete this->m_td; } void moveThread001::onTest() { #ifdef QT_DEBUG     qDebug()<<"moveThread001::onTest: pid="<<QThread::currentThreadId()<<endl; #endif }

 

使用:

main.cpp:

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#include <QCoreApplication> #include <QThread> #include <QTimer> #ifdef QT_DEBUG #include <QDebug> #endif #include "parentthread001.h" #include "movethread001.h" int main(int argc, char *argv[]) {     QCoreApplication a(argc, argv);     // #ifdef QT_DEBUG     qDebug()<<"main: pid="<<QThread::currentThreadId()<<endl; #endif //----------------------------------------------- #ifdef QT_DEBUG     qDebug()<<"parentThread001: begin."<<endl; #endif     parentThread001 *pt = new parentThread001();     pt->start();     QThread::msleep(1000);     delete pt; #ifdef QT_DEBUG     qDebug()<<"parentThread001: end."<<endl; #endif //----------------------------------------------- #ifdef QT_DEBUG     qDebug()<<"moveThread001: begin."<<endl; #endif     moveThread001 *mt = new moveThread001();     QThread::msleep(1000);     delete mt; #ifdef QT_DEBUG     qDebug()<<"moveThread001: end."<<endl; #endif     //     return a.exec(); }