PyQt5 – 为单选按钮的未选指示灯设置背景色

在这篇文章中，我们将看到当单选按钮处于未选中状态时，我们如何给它的指示器设置背景色。默认情况下，虽然我们可以用背景色来改变它，但没有颜色与未选中的状态相关。

为了给未选中状态的指示器添加背景色，我们必须改变单选按钮的样式表，下面是样式表代码。

QRadioButton::indicator:unchecked
{
background-color : lightgreen;
}

以下是实施情况

# 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 a radio button
        self.radio_button = QRadioButton(self)
  
        # setting geometry of radio button
        self.radio_button.setGeometry(200, 150, 120, 40)
  
        # setting text to radio button
        self.radio_button.setText("Radio Button")
  
        # changing style sheet code of radio button
        # setting background color to indicator when it is in unchecked state
        self.radio_button.setStyleSheet("QRadioButton::indicator:unchecked"
                                        "{"
                                        "background-color : lightgreen;"
                                        "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())