PyQt5--QCheckBox

 1 # -*- coding:utf-8 -*-
'''
Created on Sep 20, 2018

@author: SaShuangYiBing

Comment: 
'''
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication,QWidget,QCheckBox

class New_test(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()
        
    def initUI(self):
        cb = QCheckBox('Show Title',self)
        cb.move(20,20)
        cb.toggle()  # 因为前面已经设置了标题，所以这里就需要先将checkbox默认勾上，否则会导致和一次时标题与复选框状态对不上
        cb.stateChanged.connect(self.changeTitle)  # 将复选框的状态改变信号连接到自定义的槽函数changeTitle上
        
        self.setGeometry(300,300,250,150)
        self.setWindowTitle('QCheck Box')
        self.show()
        
    def changeTitle(self,state):
        if state == Qt.Checked:
            self.setWindowTitle('QCheck Box')
        else:
            self.setWindowTitle('')
            
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = New_test()
    sys.exit(app.exec_())

复选框默认勾上的标题

取消勾选的标题提示