一、创建项目

二、安装pyqt5库

三、配置PyCharm外部工具

打开File->settings->Tools->External Tools

1、配置QtDesigner

程序：D:\python3.7\Lib\site-packages\qt5_applications\Qt\bin\designer.exe//安装包的时候回自动下载，直接在包文件夹中找
工作目录：$FileDir$

2、配置PyUic

程序：D:\python3.7\python.exe//工具自己配置填写
实参：-m PyQt5.uic.pyuic $FileName$ -o $FileNameWithoutExtension$.py
工作目录：$FileDir$

3、点击应用

四、使用工具

1、打开designer

Tools->External Tools->QtDesigner

2、放置控件

保存一下就会在工程中生成untitled.ui文件

3、生成py文件

此时需要将untitled.ui文件转换为.py文件，方便pycharm查阅，右键选择External Tools，选择pyuic ，将其转换，转换后可以在左侧看见untitled.py

4、显示生成的py文件

生成的文件不能显示，需要调用

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_MainWindow(object):def setupUi(self, MainWindow):MainWindow.setObjectName("MainWindow")MainWindow.resize(800, 600)self.centralwidget = QtWidgets.QWidget(MainWindow)self.centralwidget.setObjectName("centralwidget")self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)self.gridLayout.setObjectName("gridLayout")self.horizontalLayout = QtWidgets.QHBoxLayout()self.horizontalLayout.setObjectName("horizontalLayout")self.widget = QtWidgets.QWidget(self.centralwidget)self.widget.setObjectName("widget")self.horizontalLayout.addWidget(self.widget)self.widget_2 = QtWidgets.QWidget(self.centralwidget)self.widget_2.setObjectName("widget_2")self.comboBox = QtWidgets.QComboBox(self.widget_2)self.comboBox.setGeometry(QtCore.QRect(330, 30, 171, 22))self.comboBox.setObjectName("comboBox")self.comboBox_2 = QtWidgets.QComboBox(self.widget_2)self.comboBox_2.setGeometry(QtCore.QRect(330, 60, 171, 22))self.comboBox_2.setObjectName("comboBox_2")self.comboBox_3 = QtWidgets.QComboBox(self.widget_2)self.comboBox_3.setGeometry(QtCore.QRect(330, 90, 171, 22))self.comboBox_3.setObjectName("comboBox_3")self.label = QtWidgets.QLabel(self.widget_2)self.label.setGeometry(QtCore.QRect(260, 40, 54, 12))self.label.setObjectName("label")self.label_2 = QtWidgets.QLabel(self.widget_2)self.label_2.setGeometry(QtCore.QRect(260, 70, 54, 12))self.label_2.setObjectName("label_2")self.label_3 = QtWidgets.QLabel(self.widget_2)self.label_3.setGeometry(QtCore.QRect(260, 100, 54, 12))self.label_3.setObjectName("label_3")self.horizontalLayout.addWidget(self.widget_2)self.horizontalLayout.setStretch(0, 1)self.horizontalLayout.setStretch(1, 2)self.gridLayout.addLayout(self.horizontalLayout, 0, 0, 1, 1)MainWindow.setCentralWidget(self.centralwidget)self.menubar = QtWidgets.QMenuBar(MainWindow)self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))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.translateMainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))self.label.setText(_translate("MainWindow", "TextLabel"))self.label_2.setText(_translate("MainWindow", "TextLabel"))self.label_3.setText(_translate("MainWindow", "TextLabel"))if __name__ == '__main__':import sysapp = QtWidgets.QApplication(sys.argv)mainWindow = QtWidgets.QMainWindow()ui = Ui_MainWindow()  # 这个是类名，名字根据自定义的情况变化ui.setupUi(mainWindow)mainWindow.show()sys.exit(app.exec_())

五、效果展示