PyQt5最全62 多线程之QTimer动态显示当前时间

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys


class ShowTime(QWidget):
    """
    动态显示当前时间
    QTimer
    多线程：用于同时完成多个任务

    """

    def __init__(self):
        super(ShowTime, self).__init__()

        self.initUI()

    def initUI(self):
        self.setWindowTitle('动态显示当前时间')

        self.label = QLabel('显示当前时间')
        self.startbtn = QPushButton('开始')
        self.endbtn = QPushButton('结束')
        layout = QGridLayout()

        self.timer = QTimer()
        self.timer.timeout.connect(self.showTime)

        layout.addWidget(self.label, 0, 0, 1, 2)
        layout.addWidget(self.startbtn, 1, 0)
        layout.addWidget(self.endbtn, 1, 1)

        self.startbtn.clicked.connect(self.startTimer)
        self.endbtn.clicked.connect(self.endTimer)
        self.setLayout(layout)

    def showTime(self):
        time = QDateTime.currentDateTime()
        timeDisplay = time.toString('yyyy-MM-dd hh:mm:ss dddd')
        self.label.setText(timeDisplay)

    def startTimer(self):
        self.timer.start(1000)
        self.startbtn.setEnabled(False)
        self.endbtn.setEnabled(True)

    def endTimer(self):
        self.timer.stop()
        self.startbtn.setEnabled(True)
        self.endbtn.setEnabled(False)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = ShowTime()
    print(main.__doc__)
    main.show()
    sys.exit(app.exec_())