PyQt5 – 设置组合框的帮助文本

在这篇文章中，我们将看到如何为组合框设置帮助文本，帮助文本基本上是用来告诉程序员一些紧急信息，如参考链接等，程序员为组合框设置帮助文本是为了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得到帮助。为了给组合框设置帮助文本，我们使用setWhatsThis方法。

语法： combo_box.setWhatsThis(help)

参数： 它需要字符串作为参数

返回： 无

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)
 
     
# create pyqt5 app
App = QApplication(sys.argv)
 
# create the instance of our Window
window = Window()
 
# start the app
sys.exit(App.exec())