PyQt5 - 如何知道 ComboBox 的插入策略

在本文中，我们将了解如何知道组合框的插入策略。默认情况下它插入底部，尽管我们可以随时更改它。插入策略告诉用户插入新项目时将存储在哪里。

为了知道插入策略，我们使用insertPolicy方法。

Syntax : combo_box.insertPolicy()

Argument : It takes no argument

Return : It returns InsertPolicy object (prints 3 for insert at bottom)

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, 120, 30)
  
        # geek list
        geek_list = ["Geek", "Geeky Geek", "Legend Geek", "Ultra Legend Geek"]
  
        # adding list of items to combo box
        self.combo_box.addItems(geek_list)
  
        # creating editable combo box
        self.combo_box.setEditable(True)
  
        # getting current insertion policy
        policy = self.combo_box.insertPolicy()
  
        # creating label to  print the policy
        label = QLabel("Insertion policy = " + str(policy), self)
  
        # setting geometry of the label
        label.setGeometry(200, 200, 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 ：