PyQt5 ComboBox – 用户输入的项目存储在顶部

在本文中，我们将看到用户如何在开始时在组合框中添加项目，即当用户在可编辑组合框中插入项目时，它会插入到下拉列表的顶部，默认情况下，当用户插入任何项目时它插入底部。

In order to make combo box such that item inserted by user get added at the top in the drop down list, we have to do the following –
1. Create a combo box
2. Make the combo box editable using setEditable method
3. Set insertion policy of combo box to insert at top
4. Create label
5. Retrieve the insertion policy and show it with the help of label

编程需要懂一点英语

下面是实现

Python3

# 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"]
 
        # adding list of items to combo box
        self.combo_box.addItems(geek_list)
 
        # creating editable combo box
        self.combo_box.setEditable(True)
 
        # setting insertion policy
        # making insertion to store at top
        self.combo_box.setInsertPolicy(QComboBox.InsertAtTop)
 
        # 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, 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：