PyQt5 – 如何制作圆形单选按钮？

在本文中，我们将看到如何创建圆形单选按钮。默认情况下，单选按钮的形状是矩形，但如果我们将宽度设置为等于高度，它就会变成正方形。下面是普通边框单选按钮与圆形单选按钮的表示。

In order to do this we have to do the following :

1. Create a radio button.
2. Set its width equal to height to make it square
3. Add border to it with the help of setStyleSheet method.
4. Set border radius to half of width.

样式表代码来做到这一点——

QRadioButton
{
border : 3px solid black;
border-radius : 60px;
}

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 a radio button
        self.radio_button = QRadioButton(self)
  
        # setting geometry of radio button
        self.radio_button.setGeometry(200, 150, 120, 120)
  
        # setting text to radio button
        self.radio_button.setText("Radio Button")
  
        # changing style sheet code of radio button setting border to
        # radio button and changing radius to half of width
        self.radio_button.setStyleSheet("QRadioButton"
                                        "{"
                                        "border : 3px solid black;"
                                        "border-radius : 60px;"
                                        "}")
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：