PyQt5 QSpinBox – 鼠标悬停在向上箭头上时添加背景颜色

在本文中，我们将了解如何在鼠标悬停在旋转框的向上箭头上时为其设置背景颜色。旋转框基本上由三个组件组成，一个是行编辑，另外两个是向上和向下按钮。向上箭头是向上按钮的内部部分，只有当鼠标悬停在向上箭头上时才会出现此背景颜色。

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::up-arrow:hover
{
background-color : blue;
}

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 up-arrow when mouse hover over it
        self.spin.setStyleSheet("QSpinBox::up-arrow::hover"
                                "{"
                                "background-color : blue;"
                                "}")
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：