Python 安装PyQt5 和 Qt Designer

安装PyQt5命令：

pip install PyQt5 -i https://pypi.tuna.tsinghua.edu.cn/simple

安装Qt Designer命令：

pip install PyQt5-tools -i https://pypi.tuna.tsinghua.edu.cn/simple

在命令提示符中输入 designer即可运行。。

运行界面：

可以进行简单的界面设计：

然后进行保存，会报存成.ui文件；

将ui文件转化成py文件：

在命令提示符中输入下面命令即可！

pyuic5 -o test.py test.ui

生成的test.py文件如下：

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

# Form implementation generated from reading ui file 'test.ui'
#
# Created by: PyQt5 UI code generator 5.15.2
#
# 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, QtWidgets


class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(400, 300)
        self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
        self.buttonBox.setGeometry(QtCore.QRect(30, 240, 341, 32))
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.pushButton = QtWidgets.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(120, 110, 93, 28))
        self.pushButton.setObjectName("pushButton")

        self.retranslateUi(Dialog)
        self.buttonBox.accepted.connect(Dialog.accept)
        self.buttonBox.rejected.connect(Dialog.reject)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

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

添加代码即可运行py文件：

'''
Descripttion: 
version: 
Author: LiQiang
Date: 2021-01-24 13:35:36
LastEditTime: 2021-01-24 13:50:01
'''
# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'test.ui'
#
# Created by: PyQt5 UI code generator 5.15.2
#
# 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, QtWidgets


class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(400, 300)
        self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
        self.buttonBox.setGeometry(QtCore.QRect(30, 240, 341, 32))
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.pushButton = QtWidgets.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(120, 110, 93, 28))
        self.pushButton.setObjectName("pushButton")

        self.retranslateUi(Dialog)
        # self.buttonBox.accepted.connect(Dialog.accept)
        # self.buttonBox.rejected.connect(Dialog.reject)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

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


from PyQt5.QtWidgets import QMainWindow,QApplication,QPushButton
import sys
    
if __name__=='__main__':
    app=QApplication(sys.argv)
    mainwindow=QMainWindow()
    ui=Ui_Dialog()
    ui.setupUi(mainwindow)
    mainwindow.show()
    sys.exit(app.exec_())