PyQt5 – 在组合框中获取特定索引下的项目内容
在这篇文章中,我们将看到如何获得组合框中特定索引的项目的内容。为了达到这个目的,我们将使用 itemText 方法。
语法: combo_box.itemText(index)
参数: 它需要整数作为参数。
返回: 它返回字符串,即项目的内容。
实施步骤 –
1.创建一个组合框
2.在组合框中添加项目
3.创建按钮
4.为按钮添加动作
5.创建标签以显示内容
6.在动作中,借助 itemIndex 方法获取组合框中特定索引的内容,并将其存储在变量中
7.在setText方法的帮助下显示标签中的内容。
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, 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 push button
button = QPushButton("Show content ", self)
print(self.combo_box.count())
# adding action to button
button.pressed.connect(self.find)
# creating label
self.label = QLabel(self)
# setting geometry of the label
self.label.setGeometry(200, 200, 200, 30)
def find(self):
# index
index = 2
# finding the content at index in combo box
content = self.combo_box.itemText(index)
# showing content on the screen through label
self.label.setText("Content at index 2: " + content)
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())