实现一个qt帐号密码登录，登录后对文本文件的编辑。-Implement a qt account password, edit the text file after login

QT窗口，输入用户名，密码，就可以登陆进入一个新的界面，进入之后可以输入个人详细信息，还可以编辑文本。- QT window, enter the user name and password, you can log into a new interface, you can enter after entering personal details, you can also edit the text.