PyQt5实现登录页面

import sys
 
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap, QPainter, QColor, QFont, QIcon
from PyQt5.QtWidgets import QWidget, QVBoxLayout, QApplication, QLabel, QDesktopWidget, QHBoxLayout, QFormLayout, \
  QPushButton, QLineEdit
 
 
class LoginForm(QWidget):
  def __init__(self):
    super().__init__()
    self.initUI()
 
  def initUI(self):
    """
    初始化UI
    :return:
    """
    self.setObjectName("loginWindow")
    self.setStyleSheet('#loginWindow{background-color:white}')
    self.setFixedSize(650, 400)
    self.setWindowTitle("登录")
    self.setWindowIcon(QIcon('static/logo_title.png'))
 
    self.text = "xxxx消息盒子用户登录"
 
    # 添加顶部logo图片
    pixmap = QPixmap("static/logo_header.png")
    scaredPixmap = pixmap.scaled(650, 140)
    label = QLabel(self)
    label.setPixmap(scaredPixmap)
 
    # 绘制顶部文字
    lbl_logo = QLabel(self)
    lbl_logo.setText(self.text)
    lbl_logo.setStyleSheet("QWidget{color:white;font-weight:600;background: transparent;font-size:30px;}")
    lbl_logo.setFont(QFont("Microsoft YaHei"))
    lbl_logo.move(150, 50)
    lbl_logo.setAlignment(Qt.AlignCenter)
    lbl_logo.raise_()
 
    # 登录表单内容部分
    login_widget = QWidget(self)
    login_widget.move(0, 140)
    login_widget.setGeometry(0, 140, 650, 260)
 
    hbox = QHBoxLayout()
    # 添加左侧logo
    logolb = QLabel(self)
    logopix = QPixmap("static/logo.png")
    logopix_scared = logopix.scaled(100, 100)
    logolb.setPixmap(logopix_scared)
    logolb.setAlignment(Qt.AlignCenter)
    hbox.addWidget(logolb, 1)
    # 添加右侧表单
    fmlayout = QFormLayout()
    lbl_workerid = QLabel("用户名")
    lbl_workerid.setFont(QFont("Microsoft YaHei"))
    led_workerid = QLineEdit()
    led_workerid.setFixedWidth(270)
    led_workerid.setFixedHeight(38)
 
    lbl_pwd = QLabel("密码")
    lbl_pwd.setFont(QFont("Microsoft YaHei"))
    led_pwd = QLineEdit()
    led_pwd.setEchoMode(QLineEdit.Password)
    led_pwd.setFixedWidth(270)
    led_pwd.setFixedHeight(38)
 
    btn_login = QPushButton("登录")
    btn_login.setFixedWidth(270)
    btn_login.setFixedHeight(40)
    btn_login.setFont(QFont("Microsoft YaHei"))
    btn_login.setObjectName("login_btn")
    btn_login.setStyleSheet("#login_btn{background-color:#2c7adf;color:#fff;border:none;border-radius:4px;}")
 
    fmlayout.addRow(lbl_workerid, led_workerid)
    fmlayout.addRow(lbl_pwd, led_pwd)
    fmlayout.addWidget(btn_login)
    hbox.setAlignment(Qt.AlignCenter)
    # 调整间距
    fmlayout.setHorizontalSpacing(20)
    fmlayout.setVerticalSpacing(12)
 
    hbox.addLayout(fmlayout, 2)
 
    login_widget.setLayout(hbox)
 
    self.center()
    self.show()
 
  def center(self):
    qr = self.frameGeometry()
    cp = QDesktopWidget().availableGeometry().center()
    qr.moveCenter(cp)
    self.move(qr.topLeft())
 
 
if __name__ == "__main__":
  app = QApplication(sys.argv)
  ex = LoginForm()
  sys.exit(app.exec_())