pyqt5线程的启动停止终止的两种方法tcy

QtCore.QThread 休眠启动中断                                  2020/8/2
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实例1：休眠启动
#!/usr/bin/env python
# -*- coding: utf-8 -*- 

from PyQt5.QtCore import QThread, QWaitCondition, QMutex, pyqtSignal
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QPushButton, QProgressBar 

class MyThread(QThread):
    valueChangeSignal = pyqtSignal(int) 

    def __init__(self, *args, **kwargs):
        super(MyThread, self).__init__(*args, **kwargs)
        self._isPause = False
        self._value = 0
        
        self.cond = QWaitCondition()
        self.mutex = QMutex() 

    def pause(self):
        print("线程休眠")
        self._isPause = True 

    def resume(self):
        print("线程启动")
        self._isPause = False
        self.cond.wakeAll() 

    def run(self):
        while 1:
            self.mutex.lock() 

            if self._isPause:self.cond.wait(self.mutex)
            if self._value > 100:self._value = 0
            
            self._value += 1
            self.valueChangeSignal.emit(self._value)
            self.msleep(100) 

            self.mutex.unlock() 

class Window(QWidget): 

    def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs) 

        self.t = MyThread(self) 

        layout = QVBoxLayout(self)
        self.progressBar = QProgressBar(self)
        layout.addWidget(self.progressBar)
        layout.addWidget(QPushButton('休眠', self, clicked=self.t.pause))   #self.doWait
        layout.addWidget(QPushButton('唤醒', self, clicked=self.t.resume)) #self.doWait
      
        self.t.valueChangeSignal.connect(self.progressBar.setValue)
        self.t.start() 

    # def doWait(self):self.t.pause()
    # def doWake(self):self.t.resume() 

if __name__ == '__main__':
    import sys
    import cgitb 

    sys.excepthook = cgitb.enable(1, None, 5, '')
    from PyQt5.QtWidgets import QApplication 

    app = QApplication(sys.argv)
    w = Window()
    w.show() 

    sys.exit(app.exec_()) 

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实例2：线程休眠启动终止

#!/usr/bin/env python
# -*- coding: utf-8 -*- 

import ctypes 

from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QProgressBar, QPushButton
import win32con
from win32process import SuspendThread, ResumeThread 


class MyThread(QThread):
    valueChangedSignal = pyqtSignal(int)  # 值变化信号
    handle = -1 

    def run(self):
        try:
            self.handle = ctypes.windll.kernel32.OpenThread(
                win32con.PROCESS_ALL_ACCESS, False, int(QThread.currentThreadId()))
        except Exception as e:
            print('get thread handle failed', e) 

        print('thread id', int(QThread.currentThreadId())) 

        for i in range(0, 100):
            print('value', i)
            self.valueChangedSignal.emit(i)  # 循环发送信号
            self.msleep(100) 


class Window(QWidget): 

    def __init__(self, *args, **kwargs):
        super(Window, self).__init__(*args, **kwargs) 

        # 垂直布局
        layout = QVBoxLayout(self)
        self.progressBar = QProgressBar(self)
        self.progressBar.setRange(0, 100)
        layout.addWidget(self.progressBar)
        self.startButton = QPushButton('开启线程', self, clicked=self.onStart)
        layout.addWidget(self.startButton)
        self.suspendButton = QPushButton('挂起线程', self, clicked=self.onSuspendThread, enabled=False)
        layout.addWidget(self.suspendButton)
        self.resumeButton = QPushButton('恢复线程', self, clicked=self.onResumeThread, enabled=False)
        layout.addWidget(self.resumeButton)
        self.stopButton = QPushButton('终止线程', self, clicked=self.onStopThread, enabled=False)
        layout.addWidget(self.stopButton) 

        # 当前线程id
        print('main id', int(QThread.currentThreadId())) 

        # 子线程
        self._thread = MyThread(self)
        self._thread.finished.connect(self._thread.deleteLater)
        self._thread.valueChangedSignal.connect(self.progressBar.setValue) 

    def onStart(self):
        print('main id', int(QThread.currentThreadId()))
        self._thread.start()  # 启动线程 

        self.startButton.setEnabled(False)
        self.suspendButton.setEnabled(True)
        self.stopButton.setEnabled(True) 

    def onSuspendThread(self):
        if self._thread.handle == -1:
            return print('handle is wrong')
        ret = SuspendThread(self._thread.handle)
        print('挂起线程', self._thread.handle, ret) 

        self.suspendButton.setEnabled(False)
        self.resumeButton.setEnabled(True) 

    def onResumeThread(self):
        if self._thread.handle == -1:
            return print('handle is wrong') 

        ret = ResumeThread(self._thread.handle)
        print('恢复线程', self._thread.handle, ret) 

        self.suspendButton.setEnabled(True)
        self.resumeButton.setEnabled(False) 

    def onStopThread(self):
        ret = ctypes.windll.kernel32.TerminateThread(self._thread.handle, 0)
        print('终止线程', self._thread.handle, ret) 

        self.startButton.setEnabled(False)
        self.suspendButton.setEnabled(False)
        self.resumeButton.setEnabled(False)
        self.stopButton.setEnabled(False) 

    def closeEvent(self, event):
        if self._thread.isRunning():
            self._thread.quit()
            # self._thread.terminate()# 强制 

        del self._thread
        super(Window, self).closeEvent(event) 

if __name__ == '__main__':
    import sys, os
    from PyQt5.QtWidgets import QApplication 

    print('pid', os.getpid()) 

    app = QApplication(sys.argv)
    w = Window()
    w.show() 

    sys.exit(app.exec_())

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# 原文： https://blog.csdn.net/jeekmary/article/details/88739092