PyQt5 - 将角色设置为 ComboBox 中的项目

在本文中，我们将看到如何在组合框中设置项目角色，默认情况下，当我们创建一个组合框并向其中添加项目时，没有为项目设置角色，为了设置它，我们将使用setItemData方法

Syntax : combo_box.setItemData(index, role)

Argument : It takes two argument one is integer i.e index or item and other is the string i.e role of item

Action performed : It will assign role to the item

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)
  
        # setting roles to the items
        self.combo_box.setItemData(0, "First role")
        self.combo_box.setItemData(1, "Second role")
        self.combo_box.setItemData(2, "Third role")
        self.combo_box.setItemData(3, "Forth role")
  
  
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：