PyQt5--QComboBox

 1 # -*- coding:utf-8 -*-
 2 '''
 3 Created on Sep 20, 2018
 4 
 5 @author: SaShuangYiBing
 6 
 7 Comment: 
 8 '''
 9 import sys
10 from PyQt5.QtWidgets import QApplication,QWidget,QComboBox,QLabel
11 
12 class New_test(QWidget):
13     def __init__(self):
14         super().__init__()
15         self.initUI()
16     
17     def initUI(self):
18         self.lbl = QLabel('fruit',self)
19         combo = QComboBox(self)
20         combo.addItem('apple')
21         combo.addItem('pair')
22         combo.addItem('banana')
23         combo.move(50,50)
24         self.lbl.move(50,150)
25         combo.activated[str].connect(self.onActive)
26         
27         self.setGeometry(300,300,300,200)
28         self.setWindowTitle('QCombobox')
29         self.show()
30         
31     def onActive(self,text):
32         try:            
33             self.lbl.setText(text)
34             self.lbl.adjustSize()
35         except Exception as e:
36             print (e)
37         
38 if __name__ == '__main__':
39     app = QApplication(sys.argv)
40     ex = New_test()
41     sys.exit(app.exec_())