PyQt5 – 当鼠标悬停在推送按钮上时改变其背景颜色

在这篇文章中，我们将看到如何在鼠标悬停时为一个按钮设置背景色。当光标不在按钮上时，它又会恢复到默认的颜色。

为了做到这一点，我们必须改变样式表，当鼠标悬停在按钮上时，必须增加按钮的背景颜色。下面是样式表的代码。

QPushButton::hover
{
background-color : lightgreen;
}

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
        button = QPushButton("Geek Button", self)
  
        # setting geometry of the push button
        button.setGeometry(200, 150, 100, 40)
  
        # setting background color to push button when mouse hover over it
        button.setStyleSheet("QPushButton::hover"
                             "{"
                             "background-color : lightgreen;"
                             "}")
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())