pyqt5 调用 qt designer 生成的 py文件的方法

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本文介绍使用PyQt5创建图形界面的过程，包括CallFirstMainWin.py和firstMainWin.py两个核心文件的代码示例。CallFirstMainWin.py用于启动主窗口，而firstMainWin.py则是由firstMainWin.ui文件生成，通过QtDesigner设计界面。

CallFirstMainWin.py

# -*- coding: utf-8 -*-

import sys 	
from PyQt5.QtWidgets import QApplication , QMainWindow
from firstMainWin import *

class MyMainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):    
        super(MyMainWindow, self).__init__(parent)
        self.setupUi(self)
            
if __name__=="__main__":  
    app = QApplication(sys.argv)  
    myWin = MyMainWindow()  
    myWin.show()  
    sys.exit(app.exec_())

下面的文件：firstMainWin.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'firstMainWin.ui'
#
# Created by: PyQt5 UI code generator 5.8.1
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(726, 592)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(490, 110, 93, 28))
        self.pushButton.setObjectName("pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 726, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton.setText(_translate("MainWindow", "按钮"))