下载安装Python3.7.8

python官网：https://www.python.org/

PyQt5配置

安装PyQt5

pip install PyQt5pip install qt5_tools

pytcharm创建项目

配置外部工具

QTDesigner的Arguments语句不用填
QTDesigner的Working directory语句:$ProjectFileDir$
Pyuic的Arguments语句：-m PyQt5.uic.pyuic $FileName$ -o $FileNameWithoutExtension$.py
PyUIC的Working directory语句：$FileDir$
PyRIC的Arguments语句：$FileName$ -o $FileNameWithoutExtension$_rc.py
PyRIC的Working directory语句：$FileDir$
PostgreSQL各平台安装教程：http://t.csdn.cn/w9Ff6

测试是否成功

实战

登录界面设计

登录标题

图标

标签字体设置

输入框

设置提示默认值

按钮

禁止窗口缩放

设置变量名

数据库设计

下面数据库语句是单独在Navicat里面执行的

info表

DROP TABLE IF EXISTS `info`;
CREATE TABLE `info` (`ID` int(11) NOT NULL,`sex` varchar(255) DEFAULT NULL,`age` int(11) DEFAULT NULL,`height` int(11) DEFAULT NULL,`weight` int(11) DEFAULT NULL,PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;INSERT INTO `info` VALUES ('1', '男', '18', '180', '70');
INSERT INTO `info` VALUES ('2', '女', '20', '177', '60');

login表

DROP TABLE IF EXISTS `login`;
CREATE TABLE `login` (`ID` int(11) NOT NULL AUTO_INCREMENT,`username` varchar(20) NOT NULL,`password` varchar(20) NOT NULL,PRIMARY KEY (`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;INSERT INTO `login` VALUES ('1', '小米', 'xiaomi');
INSERT INTO `login` VALUES ('2', '苹果', 'pingguo');

登录代码功能

# -*- coding: UTF-8 -*-
'''
@Project ：PyQtTest 
@File    ：main.py
@IDE     ：PyCharm 
@Author  ：Manba_77
'''from PySide2.QtWidgets import QApplication, QMessageBox
from PySide2.QtUiTools import QUiLoader
import pymysqlclass Win_Login:def __init__(self):# 从文件中加载UI定义# 从UI定义中动态创建一个相应的窗口对象# 注意：里面的控件对象也成为窗口对象的属性了# 比如 self.ui.button,self.ui.textEditself.ui = QUiLoader().load('login.ui')self.ui.btn_login.clicked.connect(self.OnSignIn)self.ui.edt_password.returnPressed.connect(self.OnSignIn)def exe_sql(self, sql):conn = pymysql.connect(host='127.0.0.1', user='root', password='123456', database='qtproject')try:cursor = conn.cursor()cursor.execute(sql)result_sql = cursor.fetchall()cursor.close()conn.close()return result_sqlexcept:result_sql = 0return result_sqldef OnSignIn(self):username = self.ui.edt_username.text().strip()password = self.ui.edt_password.text().strip()sql_1 = 'SELECT * From login;'result_sql_1 = self.exe_sql(sql_1)if result_sql_1 == 1:QMessageBox.Warning(self.ui,'用户名或密码错误')else:for res_1 in result_sql_1:print(res_1)if username == res_1[1] and password == res_1[2]:sql_2 = 'SELECT * From info;'result_sql_2 = self.exe_sql(sql_2)for res_2 in result_sql_2:if res_1[0] == res_2[0]:QMessageBox.warning(self.ui,'结果',"性别：{}\n年龄：{}\n身高：{}\n体重：{}".format(res_2[1], res_2[2], res_2[3], res_2[4]))app = QApplication([])
stat = Win_Login()
stat.ui.show()
app.exec_()

运行效果

完整项目代码

项目代码已打包放在网盘可自取，感谢三连

链接：https://pan.baidu.com/s/1gYAqzGTac62jgFBLPPPgkQ?pwd=skml 
提取码：skml