PyQt5 - 访问组合框的帮助文本

在本文中，我们将了解如何访问组合框的帮助文本。帮助文本主要用于告诉程序员参考链接等紧急信息，程序员将帮助文本设置到组合框，以便当其他程序员难以理解组合框时，他/她可以从帮助文本中获得帮助.

为了将帮助文本设置到组合框，我们使用setWhatsThis方法并访问帮助文本，我们使用whatsThis方法。

Syntax : combo_box.whatsThis()

Argument : It takes no argument

Return : It returns string

下面是实现

# 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())

输出：