PyQt5 – 获取组合框中所选项目的当前索引
在这篇文章中,我们将看到如何获取组合框中所选项目的当前索引。为了达到这个目的,我们将使用currentIndex方法。
语法: combo_box.currentIndex()
参数: 它不需要参数
返回: 它返回整数,即所选项目的索引。
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.给按钮添加动作
5.创建标签以显示计数
6.在动作中,用currentIndex方法获取组合框中当前项目的索引,并将其存储在变量中
7.用setText方法的帮助在标签中显示索引。
下面是实现方法
# 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):
# finding the current item index in combo box
index = self.combo_box.currentIndex()
# showing content on the screen through label
self.label.setText("Index : " + str(index))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())