PyQt5 - 创建一个数字时钟

在本文中，我们将看到如何使用 PyQt5 创建一个数字时钟，这个数字时钟基本上会以 24 小时格式告诉当前时间。

In order to create a digital clock we have to do the following:

1. Create a vertical layout
2. Create label to show the current time and put it in the layout and align it to the center.
3. Create a QTimer object
4. Add action to the QTimer object such that after every 1sec action method get called.
5. Inside the action method get the current time and show that time with the help of label.

下面是实现——

# importing required librarie
import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtWidgets import QVBoxLayout, QLabel
from PyQt5.QtGui import QFont
from PyQt5.QtCore import QTimer, QTime, Qt
  
  
class Window(QWidget):
  
    def __init__(self):
        super().__init__()
  
        # setting geometry of main window
        self.setGeometry(100, 100, 800, 400)
  
        # creating a vertical layout
        layout = QVBoxLayout()
  
        # creating font object
        font = QFont('Arial', 120, QFont.Bold)
  
        # creating a label object
        self.label = QLabel()
  
        # setting centre alignment to the label
        self.label.setAlignment(Qt.AlignCenter)
  
        # setting font to the label
        self.label.setFont(font)
  
        # adding label to the layout
        layout.addWidget(self.label)
  
        # setting the layout to main window
        self.setLayout(layout)
  
        # creating a timer object
        timer = QTimer(self)
  
        # adding action to timer
        timer.timeout.connect(self.showTime)
  
        # update the timer every second
        timer.start(1000)
  
    # method called by timer
    def showTime(self):
  
        # getting current time
        current_time = QTime.currentTime()
  
        # converting QTime object to string
        label_time = current_time.toString('hh:mm:ss')
  
        # showing it to the label
        self.label.setText(label_time)
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# showing all the widgets
window.show()
  
# start the app
App.exit(App.exec_())

输出 ：