PyQt5 – 访问组合框的帮助文本

在这篇文章中，我们将看到如何访问组合框的帮助文本。帮助文本基本上是用来告诉程序员一些紧急信息，比如参考链接等，程序员为组合框设置帮助文本，这样当其他程序员在理解组合框时遇到困难，他/她可以从帮助文本中获得帮助。为了给组合框设置帮助文本，我们使用setWhatsThis方法，为了访问帮助文本，我们使用whatsThis方法。

语法： combo_box.whatsThis()

参数： 它不需要参数

返回： 它返回字符串

以下是实现方法

# 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 a combo box widget
        self.combo_box = QComboBox(self)
 
        # setting geometry of combo box
        self.combo_box.setGeometry(200, 150, 150, 30)
 
        # geek list
        geek_list = ["Sayian", "Super Sayian"]
 
        # making it editable
        self.combo_box.setEditable(True)
 
        # adding list of items to combo box
        self.combo_box.addItems(geek_list)
 
        # help text
        help = "Sayian Help text"
 
        # setting help text to the combo box
        self.combo_box.setWhatsThis(help)
 
        # getting the help text
        get_help = self.combo_box.whatsThis()
         
        # creating label to show the help text
        label = QLabel("Help text :" + get_help, self)
 
        # setting geometry of the label
        label.setGeometry(200, 100, 200, 30)
 
 
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())