PyQt5 - 设置 ComboBox 中的项目数限制
在本文中,我们将看到如何限制组合框中的项目数量。当我们创建一个组合框时,没有为项目设置限制,我们可以添加任意数量的项目,尽管有时会出现条件来设置项目的最大限制。
为了设置项目数量的最大限制,我们使用setMaxCount
方法。
Syntax : combo_box.setMaxCount(n)
Argument : It takes integer as argument
Action performed : This will set maximum limit to the number of items in combo box
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 maximum number limit of items
self.combo_box.setMaxCount(2)
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :