PyQt5 QSpinBox – 在按下时为向下按钮添加背景颜色

在本文中，我们将了解如何在旋转框的向下按钮被按下时设置背景颜色。旋转框基本上有三个组件一个是行编辑另外两个是向上和向下按钮，向下按钮用于减少值。此背景颜色仅在按下向下按钮时才会出现。

为此，我们必须更改与旋转框关联的样式表，下面是样式表代码

QSpinBox::down-button:pressed
{
background-color : red;
}

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 spin box
        self.spin = QSpinBox(self)
  
        # setting geometry to spin box
        self.spin.setGeometry(100, 100, 250, 40)
  
        # setting prefix to spin
        self.spin.setPrefix("Prefix ")
  
        # setting suffix to spin
        self.spin.setSuffix(" Suffix")
  
        # setting style sheet of spin box
        # adding background color to the down-button when it get pressed
        self.spin.setStyleSheet("QSpinBox::down-button:pressed"
                                "{"
                                "background-color : red;"
                                "}")
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：