PyQt5 QSpinBox - 为多种状态添加背景图像到向下按钮

在本文中，我们将了解如何将背景图像设置为旋转框的向下按钮以显示其各种状态。旋转框有两个孩子，一个是行编辑，另一个是向上和向下按钮。向下按钮用于减少旋转框的值，基本上有三种状态，一种是正常状态，第二种是悬停状态，即光标在向下按钮上时，第三种是按下状态。

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
{
background-image : url(image1.png);
}
QSpinBox::down-button:hover
{
background-image : url(image2.png);
}
QSpinBox::down-button:pressed
{
background-image : url(image3.png);
}

这将为向下按钮的每个状态添加三个不同的背景图像，还有一些附加状态，如反悬停（！悬停）和反按下（！按下），它们分别与悬停和按下状态相反。

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 range to the spin box
        self.spin.setRange(0, 9999)
  
        # setting prefix to spin
        self.spin.setPrefix("PREFIX ")
  
        # setting suffix to spin
        self.spin.setSuffix(" SUFFIX")
  
        # setting style sheet
        # adding background image to down button
        # adding background image to down button
        # for hover and pressed state
        self.spin.setStyleSheet("QSpinBox::down-button"
                                "{"
                                "background-image : url(image.png);"
                                "}"
                                "QSpinBox::down-button:hover"
                                "{"
                                "background-image : url(skin.png);"
                                "}"
                                "QSpinBox::down-button:pressed"
                                "{"
                                "background-image : url(logo.png);"
                                "}"
                                )
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：