python pyqt5 怎样暂停和退出指定线程？

Question

怎样在点击界面的按钮暂停 或 停止 来控制线程的暂停或停止

我写的代码如下，请大神们指导下添加什么方法来控制线程

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'test1.ui'
#
# Created by: PyQt5 UI code generator 5.11.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
import time
import threading
import sys
import os
class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(387, 288)
        self.listWidget = QtWidgets.QListWidget(Dialog)
        self.listWidget.setGeometry(QtCore.QRect(110, 30, 256, 192))
        self.listWidget.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
        self.listWidget.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
        self.listWidget.setObjectName("listWidget")
        self.widget = QtWidgets.QWidget(Dialog)
        self.widget.setGeometry(QtCore.QRect(20, 40, 77, 83))
        self.widget.setObjectName("widget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.widget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.pushButton = QtWidgets.QPushButton(self.widget)
        self.pushButton.setObjectName("pushButton")
        self.verticalLayout.addWidget(self.pushButton)
        self.pushButton_2 = QtWidgets.QPushButton(self.widget)
        self.pushButton_2.setObjectName("pushButton_2")
        self.verticalLayout.addWidget(self.pushButton_2)
        self.pushButton_3 = QtWidgets.QPushButton(self.widget)
        self.pushButton_3.setObjectName("pushButton_3")
        self.verticalLayout.addWidget(self.pushButton_3)

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.pushButton.setText(_translate("Dialog", "开始"))
        self.pushButton_2.setText(_translate("Dialog", "暂停"))
        self.pushButton_3.setText(_translate("Dialog", "停止"))


class Dialog(QtWidgets.QDialog):

    def closeEvent(self, event):
        reply = QtWidgets.QMessageBox.question(self,
                                               '本程序',
                                               "是否要退出程序？",
                                               QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
                                               QtWidgets.QMessageBox.No)
        if reply == QtWidgets.QMessageBox.Yes:
            event.accept()
            os._exit(0)
        else:
            event.ignore()


class myThread(threading.Thread):
    def __init__(self, ui):
        threading.Thread.__init__(self)
        self.ui = ui

        self.counter = 0
    def run(self):
        a = 0
        while True:
            a+=1
            print(a)
            self.ui.listWidget.addItem(str(a))
            time.sleep(1)






def main():
    """
    主函数，用于运行程序
    :return: None
    """
    app = QtWidgets.QApplication(sys.argv)
    dialog = Dialog()  # 注意修改为了自己重写的Dialog类
    ui = Ui_Dialog()
    ui.setupUi(dialog)
    dialog.show()  # 显示了自己重写的Dialog类
    thread1 = myThread(ui)
    thread1.start()

    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Answer 1

https://zhidao.baidu.com/question/1760054156860674268.html