diff --git a/demo2.py b/demo2.py
deleted file mode 100644
index cada1eb..0000000
--- a/demo2.py
+++ /dev/null
@@ -1,134 +0,0 @@
-'''
-本模块用于创建登录界面并保存用户信息
-'''
-import sys
-from PyQt5.QtWidgets import QApplication, QWidget, QLineEdit, QPushButton, QVBoxLayout, QHBoxLayout, QLabel
-from PyQt5.QtCore import Qt,QTimer
-from PyQt5.QtGui import QPixmap, QPainter
-import os
-import platform
-import json
-
-class MyApp(QWidget):
-    def __init__(self):
-        super().__init__()
-        self.initUI()
-
-    def initUI(self):
-        # 加载背景图片
-        self.background = QPixmap()
-        # 创建一个垂直布局
-        mainLayout = QVBoxLayout()
-
-        # 创建三个文本框并设置占位符
-        self.nameEdit = QLineEdit()
-        self.pwdEdit = QLineEdit()
-        self.urlEdit = QLineEdit()
-
-        # 创建一个按钮并连接信号
-        btn = QPushButton('提交')
-        btn.clicked.connect(self.onSubmit)
-
-        # 创建一个用于显示错误信息的标签
-        self.errorLabel = QLabel('', self)
-        self.errorLabel.hide()  # 初始时隐藏该标签
-
-        self.setWindowTitle('头歌助手登录')
-
-        # 对于每个输入框，创建一个水平布局以保持居中
-        for label_text, edit_widget in [("用户名", self.nameEdit), 
-                                        ("密   码", self.pwdEdit), 
-                                        ("实训网址", self.urlEdit)]:
-            hbox = QHBoxLayout()
-            hbox.addStretch()
-            vbox_inner = QVBoxLayout()
-            vbox_inner.addWidget(QLabel(label_text))
-            vbox_inner.addWidget(edit_widget)
-            hbox.addLayout(vbox_inner)
-            hbox.addStretch()
-            mainLayout.addLayout(hbox)
-
-        # 添加按钮和错误信息标签到布局
-        mainLayout.addWidget(btn, 0, Qt.AlignCenter)
-        mainLayout.addWidget(self.errorLabel, 0, Qt.AlignCenter)
-
-        # 设置窗口的布局
-        self.setLayout(mainLayout)
-        self.setGeometry(300, 300, 650, 550)
-        self.centerWindow()
-
-        # 应用样式
-        self.applyStyles()
-
-    def paintEvent(self, event):
-        painter = QPainter(self)
-        painter.drawPixmap(self.rect(), self.background)
-
-    def centerWindow(self):
-        qr = self.frameGeometry()
-        cp = QApplication.desktop().availableGeometry().center()
-        qr.moveCenter(cp)
-        self.move(qr.topLeft())
-
-    def applyStyles(self):
-        self.setStyleSheet("""
-            QLineEdit {
-                border: 1px solid gray; 
-                border-radius: 10px; 
-                padding: 5px; 
-                background: rgba(255, 255, 255, 100);  
-                color: black;
-                width: 300px;
-                height: 30px;
-            }
-            QLineEdit:focus {
-                border: 3px solid black;
-            }
-            QLabel {
-                color: black;
-                font-size: 20pt;
-                font-family: "Microsoft YaHei";
-            }
-            QPushButton {
-                border: 1px solid gray;
-                border-radius: 10px;
-                background: rgba(255, 255, 255, 100);
-                color: black;
-                width: 100px;
-                height: 27px;
-            }
-            /* 样式用于错误信息标签 */
-            QLabel#errorLabel {
-                color: red;
-                font-size: 16pt;
-            }
-        """)
-
-    def onSubmit(self):
-        name = self.nameEdit.text()
-        pwd = self.pwdEdit.text()
-        url = self.urlEdit.text()
-        
-        if name == '' or pwd == '' or url == '':
-            self.showError("非法输入！")
-        else:
-            with open('userinfo.json', 'w') as f:
-                json.dump({'name': name, 'pwd': pwd, 'url': url}, f)
-            self.close()
-
-    def showError(self, message):
-        self.errorLabel.setText(message)
-        self.errorLabel.show()
-        QTimer.singleShot(2000, self.hideError)
-
-    def hideError(self):
-        self.errorLabel.hide()
-
-def main():
-    app = QApplication(sys.argv)
-    ex = MyApp()
-    ex.show()
-    sys.exit(app.exec_())
-
-if __name__ == '__main__':
-    main()