pyqt5安装及基础使用教程

1.pyqt5工具安装

（1）使用pip工具安装PyQt5工具。执行pip install PyQt5

（2）安装Qt Designer图形界面开发工具。执行pip install PyQt5-tools

安装完成后所在路径

如果出现启动失败，将pyqt5_tools里面qt/plugins/platforms目录粘贴至与qt/bin/desinger.exe文件同级就解决了

（4）IDE配置，我目前用vscode，安装插件PYQT Integration

首选项–>设置–>搜索pyqt，最后一项填写designer路径

Name：可自己定义 program：Qt Designer的安装路径 parameter：不填 directory： $FileDir$ 

Name：可自己定义 program：pyuic的安装路径 parameter：$FileName$ -o $FileNameWithoutExtension$.py directory： $FileDir$ 

2.简单的login例子

①创建新的ui

②选择textlabel，pushbutton，textbrowser构成如图所示

③双击可修改对应名称

④同时将右侧对应的from属性修改

⑤保存成为login.ui文件，右键此文件，选择compile生成对应的py文件

login.py文件代码如下，

# -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'login.ui' # # Created by: PyQt5 UI code generator 5.14.2 # # WARNING! All changes made in this file will be lost! from PyQt5 import QtCore, QtGui, QtWidgets class Ui_Form(object): def setupUi(self, Form): Form.setObjectName("Form") Form.resize(542, 311) Form.setMaximumSize(QtCore.QSize(699, 499)) self.user_lable = QtWidgets.QLabel(Form) self.user_lable.setGeometry(QtCore.QRect(40, 60, 55, 16)) self.user_lable.setObjectName("user_lable") self.pwd_lable = QtWidgets.QLabel(Form) self.pwd_lable.setGeometry(QtCore.QRect(40, 100, 55, 16)) self.pwd_lable.setObjectName("pwd_lable") self.user_lineEdit = QtWidgets.QLineEdit(Form) self.user_lineEdit.setGeometry(QtCore.QRect(130, 60, 113, 22)) self.user_lineEdit.setObjectName("user_lineEdit") self.pwd_lineEdit = QtWidgets.QLineEdit(Form) self.pwd_lineEdit.setGeometry(QtCore.QRect(130, 100, 113, 22)) self.pwd_lineEdit.setObjectName("pwd_lineEdit") self.login_Button = QtWidgets.QPushButton(Form) self.login_Button.setGeometry(QtCore.QRect(40, 180, 93, 28)) self.login_Button.setObjectName("login_Button") self.cancel_Button = QtWidgets.QPushButton(Form) self.cancel_Button.setGeometry(QtCore.QRect(170, 180, 93, 28)) self.cancel_Button.setObjectName("cancel_Button") self.user_textBrowser = QtWidgets.QTextBrowser(Form) self.user_textBrowser.setGeometry(QtCore.QRect(290, 61, 231, 131)) self.user_textBrowser.setObjectName("user_textBrowser") self.retranslateUi(Form) QtCore.QMetaObject.connectSlotsByName(Form) def retranslateUi(self, Form): _translate = QtCore.QCoreApplication.translate Form.setWindowTitle(_translate("Form", "Form")) self.user_lable.setText(_translate("Form", "用户名")) self.pwd_lable.setText(_translate("Form", "密码")) self.login_Button.setText(_translate("Form", "登录")) self.cancel_Button.setText(_translate("Form", "退出")) 

⑥逻辑实现代码，同目录下创建call_login.py文件

import sys #PyQt5中使用的基本控件都在PyQt5.QtWidgets模块中 from PyQt5.QtWidgets import QApplication, QMainWindow #导入designer工具生成的login模块 from login import Ui_Form class MyMainForm(QMainWindow, Ui_Form): def __init__(self, parent=None): super(MyMainForm, self).__init__(parent) self.setupUi(self) #添加登录按钮信号和槽。注意display函数不加小括号() self.login_Button.clicked.connect(self.display) #添加退出按钮信号和槽。调用close函数 self.cancel_Button.clicked.connect(self.close) def display(self): #利用line Edit控件对象text()函数获取界面输入 username = self.user_lineEdit.text() password = self.pwd_lineEdit.text() #利用text Browser控件对象setText()函数设置界面显示 self.user_textBrowser.setText("登录成功!\n" + "用户名是: "+ username+ ",密码是： "+ password) if __name__ == "__main__": #固定的，PyQt5程序都需要QApplication对象。sys.argv是命令行参数列表，确保程序可以双击运行 app = QApplication(sys.argv) #初始化 myWin = MyMainForm() #将窗口控件显示在屏幕上 myWin.show() #程序运行，sys.exit方法确保程序完整退出。 sys.exit(app.exec_()) 

⑦运行效果