PyQT5 - 使用QT Designer创建基本窗口

【环境配置】

pip install pyqt5 （安装pyQT5库）：pyuic5包含在内

pip install pyqt5-tools （安装QT-Designer）

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【使用QT Designer布局窗体】

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【UI文件的编译】

将.UI文件编译为.PY文件(CMD命令行中)：

pyuic5 xxx.ui -o xxx.py  

#不可以存在中文！

打开编译后的.py文件，新建SLOT()函数并修改连接函数：

 在末尾添加运行代码：

if __name__ == "__main__":    
	import sys    
	app = QtWidgets.QApplication(sys.argv)    
	MainWindow = QtWidgets.QMainWindow()    
	ui = Ui_MainWindow()    
	ui.setupUi(MainWindow)    
	MainWindow.show()    
	sys.exit(app.exec_())

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 【编译后的.PY源码】

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

# Form implementation generated from reading ui file 'C:\Users\Geclipse\Desktop\untitled.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# 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(800, 600)
        MainWindow.setMouseTracking(False)
        MainWindow.setWindowOpacity(1.0)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(300, 0, 161, 71))
        font = QtGui.QFont()
        font.setPointSize(12)
        font.setBold(True)
        font.setItalic(False)
        font.setUnderline(False)
        font.setWeight(75)
        font.setStrikeOut(False)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(20, 220, 751, 321))
        self.textEdit.setObjectName("textEdit")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(300, 90, 141, 61))
        font = QtGui.QFont()
        font.setPointSize(12)
        font.setBold(True)
        font.setWeight(75)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName("pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 26))
        self.menubar.setObjectName("menubar")
        self.menu_1 = QtWidgets.QMenu(self.menubar)
        self.menu_1.setObjectName("menu_1")
        self.menu_2 = QtWidgets.QMenu(self.menubar)
        self.menu_2.setObjectName("menu_2")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.actionFunction1 = QtWidgets.QAction(MainWindow)
        self.actionFunction1.setObjectName("actionFunction1")
        self.actionFunction2 = QtWidgets.QAction(MainWindow)
        self.actionFunction2.setObjectName("actionFunction2")
        self.actionExit = QtWidgets.QAction(MainWindow)
        self.actionExit.setObjectName("actionExit")
        self.actionExit_2 = QtWidgets.QAction(MainWindow)
        self.actionExit_2.setObjectName("actionExit_2")
        self.menu_1.addAction(self.actionFunction1)
        self.menu_1.addAction(self.actionFunction2)
        self.menu_1.addSeparator()
        self.menu_1.addAction(self.actionExit_2)
        self.menubar.addAction(self.menu_1.menuAction())
        self.menubar.addAction(self.menu_2.menuAction())
        self.textEdit.setText("pyuic untitled.ui -o untitled.py")

        self.retranslateUi(MainWindow)
        self.pushButton.clicked.connect(self.add_hello_qt)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
        
    def add_hello_qt(self):
        self.textEdit.setText("Hello QT!")

#★★★ def retranslateUi(eslf,MainWindow)
#translate翻译
#retranslate重译（对界面中控件所进行的其他调整：如设置标题会出现在这里）
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "This is a simple title"))
        self.label.setText(_translate("MainWindow", "Simple Widget"))
        self.pushButton.setStatusTip(_translate("MainWindow", "click this will add ‘hello QT’ in below area"))
        self.pushButton.setText(_translate("MainWindow", "Hello QT"))
        self.menu_1.setTitle(_translate("MainWindow", "菜单栏1"))
        self.menu_2.setTitle(_translate("MainWindow", "菜单栏2"))
        self.actionFunction1.setText(_translate("MainWindow", "Function1"))
        self.actionFunction2.setText(_translate("MainWindow", "Function2"))
        self.actionExit.setText(_translate("MainWindow", "Exit"))
        self.actionExit_2.setText(_translate("MainWindow", "Exit"))



#下面的这些部分需要手动打开py文件进行添加
if __name__ == "__main__":    
	import sys    
	app = QtWidgets.QApplication(sys.argv)    
	MainWindow = QtWidgets.QMainWindow()    
	ui = Ui_MainWindow()    
	ui.setupUi(MainWindow)    
	MainWindow.show()    
	sys.exit(app.exec_())

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【运行结果】