注意：本次实现线程的暂停执行主要采用互斥量的方法，如果有更好的实现方法的小伙伴可以在下面留言！
直接插入代码了，由于做的小demo，代码写的可能有点乱，但还算完整。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
//mythread.h#ifndef MYTHREAD_H#define MYTHREAD_H#include <QDebug>#include <QThread>#include <QMutex>class MyThread:public QThread
{ Q_OBJECT
public:
MyThread();
~MyThread();
void run();
public slots:
void threadStart();
void threadPause();
void threadStop();
void threadResume();
void threadPR();
private:
bool m_buttonState; //if pause m_buttonState=false;else m_buttonState=true;
int m_i;
QMutex m_mutex;//互斥量
};#endif // MYTHREAD_H |
1 //mythread.cpp
2 #include "mythread.h"
3 MyThread::MyThread()
4 {
5 m_i=0;
6 m_buttonState=false;
7 }
8
9 MyThread::~MyThread()
10 {
11
12 }
13
14 void MyThread::run()
15 {
16 m_buttonState=true;
17 while(1)
18 {
19 m_mutex.lock();
20 m_i++;
21 qDebug()<<QString("the value of m_i is %1 ").arg(m_i);
22 m_mutex.unlock();
23 this->sleep(1);
24 }
25
26
27
28 }
29
30
31 void MyThread::threadPause()
32 {
33 qDebug()<<QString("pause :%1").arg(m_buttonState);
34 this->m_mutex.lock();
35 this->m_buttonState=false;
36 qDebug()<<QString("pause");
37 }
38 void MyThread::threadResume()
39 {
40 qDebug()<<QString("resume :%1").arg(m_buttonState);
41 this->m_mutex.unlock();
42 this->m_buttonState=true;
43 qDebug()<<QString("resume");
44
45 }
46 void MyThread::threadStop()
47 {
48 this->exit();
49
50 }
51 void MyThread::threadStart()
52 {
53 this->start();
54 }
55 void MyThread::threadPR()
56 {
57 if(m_buttonState)
58 {
59 threadPause();
60
61 }
62 else
63 {
64 threadResume();
65 }
66
67 }
1 //mainwindow.h
2 #ifndef MAINWINDOW_H
3 #define MAINWINDOW_H
4
5 #include <QMainWindow>
6 #include "mythread.h"
7 namespace Ui {
8 class MainWindow;
9 }
10
11 class MainWindow : public QMainWindow
12 {
13 Q_OBJECT
14
15 public:
16 explicit MainWindow(QWidget *parent = 0);
17 ~MainWindow();
18 private slots:
19 void changeButton();
20 void threadStop();
21 void threadStart();
22 void threadPR();
23 private:
24 Ui::MainWindow *ui;
25 MyThread *myThread;
26 MyThread *oneThread;
27
28 };
29
30 #endif // MAINWINDOW_H
1 //mainwindow.cpp
2 #include "mainwindow.h"
3 #include "ui_mainwindow.h"
4
5 MainWindow::MainWindow(QWidget *parent) :
6 QMainWindow(parent),
7 ui(new Ui::MainWindow)
8 {
9 ui->setupUi(this);
10 myThread=new MyThread;
11 oneThread=new MyThread;
12 connect(ui->pauseButton,SIGNAL(clicked()),this,SLOT(changeButton()));
13 connect(ui->startButton,SIGNAL(clicked()),this,SLOT(threadStart()));
14 connect(ui->pauseButton,SIGNAL(clicked()),this,SLOT(threadPR()));
15 connect(ui->stopButton,SIGNAL(clicked()),this,SLOT(threadStop()));
16 }
17
18 MainWindow::~MainWindow()
19 {
20 if(ui!=NULL)
21 {
22 delete ui;
23 ui=NULL;
24 }
25 if(myThread!=NULL)
26 {
27 delete myThread;
28 myThread=NULL;
29 }
30 if(oneThread!=NULL)
31 {
32 delete oneThread;
33 oneThread=NULL;
34 }
35 }
36
37 void MainWindow::changeButton()
38 {
39
40
41 if(!QString::compare(ui->pauseButton->text(),QString::fromUtf8("暂停")))
42 {
43 ui->pauseButton->setText(QString::fromUtf8("继续"));
44 }else
45 {
46 ui->pauseButton->setText(QString::fromUtf8("暂停"));
47 }
48 }
49
50 void MainWindow::threadStart()
51 {
52 myThread->threadStart();
53 oneThread->threadStart();
54
55 }
56 void MainWindow::threadStop()
57 {
58 myThread->terminate();
59 oneThread->terminate();
60
61 }
62 void MainWindow::threadPR()
63 {
64 myThread->threadPR();
65 oneThread->threadPR();
66
67
68 }
还有一个简单的ui界面就不贴了，就三个button
暂停、继续就可以实现了，但很奇怪的事情是当将线程terminate 后再调用start 也会好像出现“暂停、继续”的效果，这个正在思考中，如果小伙伴有知道的留言tell me啊！