PyQt5实现从主窗口打开子窗口的方法

1.在Qt Designer中设计两个简单窗口

2.将.ui文件转换成.py文件

3.新建**.py文件

#-*- coding:utf-8 -*-
from PyQt5.QtWidgets import QMainWindow, QApplication
from window import Ui_MainWindow
from child import Ui_Child
import sys

class Main(QMainWindow,Ui_MainWindow):
 def __init__(self):
   super(Main, self).__init__()
   self.setupUi(self)

class Child(QMainWindow,Ui_Child):
 def __init__(self):
   super(Child, self).__init__()
   self.setupUi(self)
   self.pushButton.clicked.connect(self.close)
 def OPEN(self):
   self.show()

if __name__ =="__main__":
 app = QApplication(sys.argv)
 main = Main()
 ch = Child()
 main.show()
 main.pushButton.clicked.connect(ch.OPEN)
 sys.exit(app.exec_())

来源：https://blog.csdn.net/Hubz131/article/details/79353818