下载安装Python3.7.8

python官网：https://www.python.org/

PyQt5配置

安装PyQt5

pip install PyQt5

pip 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 pymysql

class 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.textEdit
        self.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_sql
        except:
            result_sql = 0
            return result_sql


    def 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