PyQt_QTimer

dialog_new.py如下：

from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Dialog(object):def setupUi(self, Dialog):Dialog.setObjectName("Dialog")Dialog.resize(400, 300)self.pushButton = QtWidgets.QPushButton(Dialog)self.pushButton.setGeometry(QtCore.QRect(150, 180, 80, 20))self.pushButton.setObjectName("pushButton")self.retranslateUi(Dialog)QtCore.QMetaObject.connectSlotsByName(Dialog)def retranslateUi(self, Dialog):_translate = QtCore.QCoreApplication.translateDialog.setWindowTitle(_translate("Dialog", "Dialog"))self.pushButton.setText(_translate("Dialog", "开始计时"))

main.py如下：

import dialog_new
import sys
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QDialog
from PyQt5.QtCore import QTimerclass Dialog():def init(self, mainWindow, mainView):self.mainWindow = mainWindowself.mainView = mainViewself.mainView.setupUi(mainWindow)self.mainView.pushButton.clicked.connect(self.printClick)self.number = 10self.timer = QTimer()  # 实例化一个QTimer实例def printClick(self):print("开始计时")self.timer.start(1000)  # 设置定时器的定时间隔时间，为1000ms# 将timeout信号与槽timeStart连接，每隔1s调用一次timeStart函数self.timer.timeout.connect(self.timeStart)def timeStart(self):self.number -= 1print(self.number)if self.number <= 0:print("停止计时")self.timer.stop()if __name__ == '__main__':app = QApplication(sys.argv)mainDialog = Dialog()mainWindow = QDialog()mainView = dialog_new.Ui_Dialog()mainDialog.init(mainWindow, mainView)mainWindow.show()sys.exit(app.exec_())

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