PytQt5 – 将动作添加到复选框

在本文中，我们将了解如何将操作设置为复选框。向复选框添加操作意味着当复选框被选中时，它应该执行一些任务。为此，我们将使用stateChanged.connect方法，当复选框的状态发生更改时，它将连接到操作。

Syntax : checkbox.stateChanged.connect(method_name)

Argument : It takes method name as argument.

Action performed : It will call the method when check box will be checked

下面是实现。

# importing libraries
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys
  
  
class Window(QMainWindow):
  
    def __init__(self):
        super().__init__()
  
        # setting title
        self.setWindowTitle("Python ")
  
        # setting geometry
        self.setGeometry(100, 100, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for widgets
    def UiComponents(self):
  
        # creating the check-box
        checkbox = QCheckBox('Show Label', self)
  
        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 30)
  
        # adding action to check box
        checkbox.stateChanged.connect(self.action)
  
    # creating action method
    def action(self):
  
        # creating label
        self.label = QLabel("Check Box is checked", self)
  
        # moving the label
        self.label.move(200, 200)
  
        # adjusting the size of label
        self.label.adjustSize()
  
        # showing the label
        self.label.show()
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：

当复选框被选中时，窗口将如下所示