PyQt5 - 通过 ComboBox 中的文本查找项目

在本文中，我们将了解如何借助其中的文本找到项目索引。我们知道我们可以借助addItem和addItems方法添加项目，以便借助findText方法找到项目。

Syntax : combo_box.findText(text)

Argument : It takes string as argument.

Return : It return integer i.e index of text if text doesn’t exist it return -1

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)
  
        # text
        text = "Legend Geek"
  
        # finding index of text
        index = self.combo_box.findText(text)
  
        # label to show index
        label = QLabel(text + " index : " + str(index), self)
  
        # setting geometry of label
        label.setGeometry(200, 200, 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 ：