编写一个用户登录界面，用户可以登录账户信息，如果账户已经存在，可以直接登录，登录名或者登录密码输入错误会提示，如果账户不存在，提示用户注册，点击注册进去注册页面，输入注册信息，确定后便可以返回登录界面进行登录。进入个人主页可以对个人信息进行修改。
import tkinter as tkfrom tkinter import messagebox # import this to fix messagebox errorimport pickleusername = ''# 登录界面def welcome(): def usr_login(): usr_name = var_usr_name.get() usr_pwd = var_usr_pwd.get() try: with open('usrs_info.pickle', 'rb') as usr_file: usrs_info = pickle.load(usr_file) usr_file.close() except FileNotFoundError: with open('usrs_info.pickle', 'wb') as usr_file: usrs_info = {'admin': 'admin'} pickle.dump(usrs_info, usr_file) usr_file.close() if usr_name in usrs_info: if usr_pwd == usrs_info[usr_name]: tk.messagebox.showinfo(title='Welcome', message='How are you? ' + usr_name) # 进入主页 global username username= usr_name print(username) window.destroy() index_page() else: tk.messagebox.showerror(message='Error, your password is wrong, try again.') else: is_sign_up = tk.messagebox.askyesno('Welcome', 'You have not signed up yet. Sign up today?') if is_sign_up: usr_sign_up() window = tk.Tk() window.title('Welcome to the login page!') window.geometry('450x300') # welcome image canvas = tk.Canvas(window, height=200, width=500) image_file = tk.PhotoImage(file='welcome.gif') image = canvas.create_image(0, 0, anchor='nw', image=image_file) canvas.pack(side='top') # user information tk.Label(window, text='User name: ').place(x=50, y=150) tk.Label(window, text='Password: ').place(x=50, y=190) var_usr_name = tk.StringVar() entry_usr_name = tk.Entry(window, textvariable=var_usr_name) entry_usr_name.place(x=160, y=150) var_usr_pwd = tk.StringVar() entry_usr_pwd = tk.Entry(window, textvariable=var_usr_pwd, show='*') entry_usr_pwd.place(x=160, y=190) # login and sign up button btn_login = tk.Button(window, text='Login', command=usr_login) btn_login.place(x=170, y=230) btn_sign_up = tk.Button(window, text='Sign up', command=usr_sign_up) btn_sign_up.place(x=270, y=230) window.mainloop()# 个人信息页面def index_page(): global username index_window = tk.Tk() index_window.title('请选择你要进行的操作') index_window.geometry('300x200') tk.Label(index_window,text="你好!"+username).place(x=50,y=50) # 修改个人信息 def change_personal_info(): # 新窗口 change_info__window = tk.Toplevel() change_info__window.title('修改个人信息') change_info__window.geometry('400x300') # 修改个人信息点击页面 def change_info_click(): name = new_name.get() psw = new_password.get() conpsw = new_password_confirm.get() with open('usrs_info.pickle', 'rb') as f: usrs_info = pickle.load(f) f.close() if conpsw!= psw: tk.messagebox.showerror(title='Error', message='两次密码不一致请重新输入！') else: if name in usrs_info: tk.messagebox.showerror(title='Error', message='用户名已存在，请重新换一个新用户名') else: # 创建新 usrs_info.pop(username) usrs_info[name] = psw with open('usrs_info.pickle', 'wb') as file: pickle.dump(usrs_info, file) f.close() tk.messagebox.showinfo(title='修改成功', message='修改成功！') change_info__window.destroy() tk.messagebox.showinfo(title='请重新登录！', message='请重新登录！') index_window.destroy() welcome() # 修改用户名变量 new_name = tk.StringVar() tk.Label(change_info__window, text="用户名：").place(x=50, y=50) new_name_entry = tk.Entry(change_info__window, show=None, textvariable=new_name).place(x=120, y=50) # 修改新密码变量 new_password = tk.StringVar() tk.Label(change_info__window, text='密码:').place(x=50, y=80) new_password_entry = tk.Entry(change_info__window, show="*", textvariable=new_password).place(x=120, y=80) # 修改新确认密码变量 new_password_confirm = tk.StringVar() tk.Label(change_info__window, text="确认密码：").place(x=50, y=110) new_password_confirm_entry = tk.Entry(change_info__window, show="*", textvariable=new_password_confirm).place(x=120, y=110) # 修改信息按钮绑定 sign_window_button = tk.Button(change_info__window, text='确认', command=change_info_click).place(x=150, y=140) # 修改个人信息按钮绑定 change_info_button = tk.Button(index_window,text='修改个人信息',command=change_personal_info).place(x=100,y=100)# 注册页面def usr_sign_up(): sign_up_window = tk.Toplevel() sign_up_window.title('注册') sign_up_window.geometry('400x200') # 注册点击事件 def sign_up_hit(): name = new_name.get() psw = new_password.get() conpsw = new_password_confirm.get() with open('usrs_info.pickle', 'rb') as usr_file: usrs_info = pickle.load(usr_file) if psw!=conpsw: tk.messagebox.showerror(title='Error', message='两次密码不一致请重新输入！') else: if name in usrs_info: tk.messagebox.showerror(title='Error', message='用户名已存在') else: # 创建新 usrs_info[name] = psw with open('usrs_info.pickle', 'wb') as f: pickle.dump(usrs_info,f) tk.messagebox.showinfo(title='注册成功', message='注册成功！') sign_up_window.destroy() # 注册名变量 new_name = tk.StringVar() tk.Label(sign_up_window,text="注册名：").place(x=50,y=50) new_name_entry = tk.Entry(sign_up_window,show=None,textvariable=new_name).place(x=120,y=50) # 注册密码变量 new_password = tk.StringVar() tk.Label(sign_up_window,text='密码:').place(x=50,y=80) new_password_entry = tk.Entry(sign_up_window,show="*",textvariable=new_password).place(x=120,y=80) # 注册确认密码变量 new_password_confirm= tk.StringVar() tk.Label(sign_up_window,text="确认密码：").place(x=50,y=110) new_password_confirm_entry = tk.Entry(sign_up_window,show="*",textvariable=new_password_confirm).place(x=120,y=110) # 注册按钮和点击事件绑定 sign_window_button = tk.Button(sign_up_window,text='注册',command=sign_up_hit).place(x=150,y=140)welcome()
