pyqt5利用pyqtDesigner实现登录界面

import sys

import pymysql

from loginUI import *  //导入

from PyQt5.QtWidgets import *

from PyQt5 import QtWidgets, QtCore, QtGui

from PyQt5.QtCore import *

from PyQt5.QtGui import

class Login(QtWidgets.QDialog):

 def __init__(self):

  super(Login, self).__init__()

  self.ui = Ui_login_Ui()

  self.ui.setupUi(self)

  # self.setMinimumSize(QtCore.QSize(400, 200)) # 控制缩放范围

  # self.setMaximumSize(QtCore.QSize(400, 200))

  self.setWindowTitle("欢迎使用停车场管理系统")

  self.setFixedSize(self.width(), self.height())

  self.ui.labelTip.hide()

  self.ui.labelTip.setText("密码或用户名不能为空!")

  # 设置label字体

  labelFont = QFont()

  labelFont.setPixelSize(15)

  # 设置动态背景

  self.gif = QMovie('bg2.gif')

  self.ui.label_2.setMovie(self.gif)

  self.gif.start()

  # 这在label属性

  self.ui.labelTip.setStyleSheet(

   "QLabel{color:red;font-size:12px;font-weight:bold;font-family:Roman times;}"

         )

  self.ui.userLabel.setStyleSheet("QLabel{background:white;}"

     "QLabel{color:rgb(100,100,100,250);font-size:15px;font-weight:bold;font-family:Roman times;}"

     "QLabel:hover{color:rgb(300,300,300,120);}")

  self.ui.pwdlabel.setStyleSheet("QLabel{background:white;}"

     "QLabel{color:rgb(100,100,100,250);font-size:15px;font-weight:bold;font-family:Roman times;}"

     "QLabel:hover{color:rgb(300,300,300,120);}")

  self.ui.label.setStyleSheet("QLabel{background:white;}"

     "QLabel{color:rgb(100,100,100,250);font-size:15px;font-weight:bold;font-family:Roman times;}"

     "QLabel:hover{color:rgb(300,300,300,120);}")

  

  self.ui.loginButton.setStyleSheet("QPushButton{color:black}"

            "QPushButton:hover{color:red}"

            "QPushButton{background-color:lightblue}"

            "QPushButton{border:2px}"

            "QPushButton{border-radius:10px}"

            "QPushButton{padding:2px 4px}")

  self.ui.registerButton.setStyleSheet("QPushButton{color:black}"

            "QPushButton:hover{color:red}"

            "QPushButton{background-color:lightgreen}"

            "QPushButton{border:2px}"

            "QPushButton{border-radius:10px}"

            "QPushButton{padding:2px 4px}")

  

  palette = QPalette()

  icon = QPixmap('bg2.gif').scaled(800, 600)

  palette.setBrush(self.backgroundRole(), QBrush(icon))

  self.setPalette(palette)

  self.ui.userLabel.setFont(labelFont)

  self.ui.pwdlabel.setFont(labelFont)

  self.ui.label.setFont(labelFont)

  # 设置控件尺寸

  # self.ui.userlineEdit.setFrame(False)

  # self.ui.pwdlineEdit.setFrame(False)

  self.ui.pwdlineEdit.setEchoMode(QLineEdit.Password)# 输入框设为密码模式

  self.ui.pwdlineEdit.setClearButtonEnabled(True)

  self.ui.userlineEdit.setClearButtonEnabled(True)

  self.ui.userlineEdit.setFixedWidth(190)

  self.ui.userlineEdit.setFixedHeight(30)

  self.ui.pwdlineEdit.setFixedWidth(190)

  self.ui.pwdlineEdit.setFixedHeight(30)

  self.ui.comboBox.setFixedWidth(100)

  self.ui.comboBox.setFixedHeight(28)

  self.ui.loginButton.setFixedSize(75, 28)

  self.ui.registerButton.setFixedSize(75, 28)

  self.ui.loginButton.setShortcut('Enter') # shortcut key

  # 登陆的槽函数登陆按钮 最好写在init的析构函数中，避免链接多次产生异常

  self.ui.loginButton.clicked.connect(self.slotLogin)

  self.ui.registerButton.clicked.connect(self.slotRegister)

  self.ui.pushButton.clicked.connect(self.findPwd)

  name = self.ui.userlineEdit.text()

  pwd = self.ui.pwdlineEdit.text()

  identity = self.ui.comboBox.currentIndex()

  identity = str(identity)

  sql = "select * from administrater where username = '" + name + "' and password = '" + pwd + "' and identity= '"+ identity +"' "

  db = PyMySQLHelper()

  db.selectALL(sql)

 def keyPressEvent(self, event):

  if event.key() == QtCore.Qt.Key_Enter:

   self.slotLogin()

 def findPwd(self):

  # self.accept()

  self.u = FPwd_ui()

  self.u.show()

  # self.ui.exec()

 def slotLogin(self):

  # # 获得登录输入

  name = self.ui.userlineEdit.text()

  pwd = self.ui.pwdlineEdit.text()

  print(name)

  db = PyMySQLHelper()

  identity = self.ui.comboBox.currentIndex() # 获取下标

  identity = str(identity)

  if name != '' and pwd != '':

   if identity == '0':

    sql = "select * from administrater where username = '" + name + "' and " \

                    "password = '" + pwd + "' and identity= '" + identity + "' "

    print(sql)

    # cursor.execute(sql)

    # results = cursor.fetchall()

    results = db.selectALL(sql)

    if results:

     self.ui1 = Finance()

     # self.ui1.exec()

     self.ui1.show()

     self.close()

    else:

     OK = QMessageBox.warning(self, ("警告"), ("""账号或密码错误！"""))

    # cursor.close()

    # conn.close()

   elif identity == '1':

    sql = "select * from administrater where username = '" + name + "' and " \

                    "password = '" + pwd + "' and identity= '" + identity + "' "

    print(sql)

    # cursor.execute(sql)

    # results = cursor.fetchall()

    results = db.selectALL(sql)

    if results:

     self.ui2 = InfoManage()

     self.ui2.show()

     self.close()

    else:

     OK = QMessageBox.warning(self, ("警告"), ("""账号或密码错误！"""))

   elif identity == '2':

    sql = "select * from administrater where username = '" + name + "' and " \

                    "password = '" + pwd + "' and identity= '" + identity + "' "

    print(sql)

    results = db.selectALL(sql)

    # print(identity)

    if results:

     self.uu = SeatManage()

     self.uu.exec()

     self.close()

    else:

     OK = QMessageBox.warning(self, ("警告"), ("""账号或密码错误！"""))

   elif name == 'admin' and pwd == '123' and identity == '3':

    self.a = Admin()

    self.a.show()

    self.close()

  else:

   if name == '':

    OK = QMessageBox.warning(self, ("警告"), ("""请输入账号！"""))

   if pwd == '':

    OK = QMessageBox.warning(self, ("警告"), ("""请输入密码！"""))

  # cursor.close()

  # conn.close()

 def slotRegister(self):

  self.i = reUi() # self.i的窗口命名不能重复

  self.i.exec_()

if __name__ == '__main__':

 app = QtWidgets.QApplication(sys.argv)

 my = Login()

 my.show()

 sys.exit(app.exec_())