PyQt5 – 为组合框添加动作

在这篇文章中，我们将看到如何向组合框添加动作。动作基本上是组合框在发生变化时调用的方法，这些变化可以是用户插入的新项目或用户选择的任何项目。

为了做到这一点，我们将使用 activated.connect 方法。

语法： combo_box.activated.connect(self.do_something)

参数： 它需要被调用的方法名称作为参数。

返回：无

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, 150, 30)
  
        # geek list
        geek_list = ["Sayian", "Super Sayian"]
  
        # making it editable
        self.combo_box.setEditable(True)
  
        # adding list of items to combo box
        self.combo_box.addItems(geek_list)
  
        # adding action to combo box
        self.combo_box.activated.connect(self.do_something)
  
    # method called by combo box
    def do_something(self):
          
        # printing something
        print("Something Something")
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())