PyQt5 – 悬停时改变标签的背景颜色

在这篇文章中，我们将看到如何在光标悬停在标签上时改变其背景颜色。当光标停留在标签上时，它将改变颜色，而当光标不在标签上时，它又恢复到默认颜色。为了做到这一点，我们必须改变用于标签对象的样式表代码，必须在鼠标悬停在它上面时设置背景颜色，下面是样式表代码。

QLabel::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 label
        label = QLabel("Hello Geeks", self)
 
        # setting geometry of the label
        label.setGeometry(200, 150, 100, 40)
 
        # setting background color to label when mouse hover over it
        label.setStyleSheet("QLabel::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())