PyQt5 QSpinBox – 当上升按钮被按下时为其添加背景色

在这篇文章中，我们将看到如何在旋转盒的向上按钮被按下时为其设置背景色。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，向上按钮用于增加数值。只有当向上按钮被按下时，背景才会出现。

为了做到这一点，我们必须改变与旋转框相关的样式表，下面是样式表的代码

QSpinBox::up-button:pressed
{
background-color : blue;
}

下面是实现的过程

# 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-button when it get pressed
        self.spin.setStyleSheet("QSpinBox::up-button:pressed"
                                "{"
                                "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())