PyQt5 – 改变被按下的按钮的颜色

在这篇文章中，我们将看到如何使一个按钮在被按下时做出反应。当按钮被释放时，它将恢复到原来的颜色，默认情况下，当按钮被点击时，它将变成浅蓝色，尽管我们可以改变这个颜色。

为了改变按钮的颜色，我们必须改变按钮的样式表，下面是用于按钮对象的样式表代码。

QPushButton::clicked
{
background-color : red;
}

以下是实施情况。

# 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 push button widget
        button = QPushButton("Button ", self)
  
        # setting geometry
        button.setGeometry(200, 100, 100, 40)
  
        # adding background color to button
        # and background color to pressed button
        button.setStyleSheet("QPushButton"
                             "{"
                             "background-color : lightblue;"
                             "}"
                             "QPushButton::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())