图形化界面的开发(GUI)_Tkinter库的使用-综合案例-登录界面

import tkinter as tk
from tkinter import messagebox
from PIL import Image, ImageTk

# 创建主窗口
window = tk.Tk()
window.title("登录界面")
window.geometry("800x600")

# 用于存储注册用户信息
users = {}
# 定义登录函数
def login():
    username = username_entry.get()
    password = password_entry.get()
    if username in users and users[username] == password:
        messagebox.showinfo("登录成功", "欢迎，你已成功登录！")
    else:
        messagebox.showerror("登录失败", "用户名或密码错误，请重试。")

# 定义注册函数
def register():
    # 创建注册窗口
    register_window = tk.Toplevel(window)
    register_window.title("注册界面")
    register_window.geometry("400x300")

    # 注册窗口的标题
    register_title_label = tk.Label(register_window, text="注册新用户", font=("font/jian.ttf", 20))
    register_title_label.place(x=200, y=50, anchor="center")

    # 注册用户名输入框
    register_username_label = tk.Label(register_window, text="用户名：", font=("font/jian.ttf", 16))
    register_username_label.place(x=50, y=120)
    register_username_entry = tk.Entry(register_window, width=20, font=("font/jian.ttf", 16))
    register_username_entry.place(x=150, y=120)

    # 注册密码输入框
    register_password_label = tk.Label(register_window, text="密码：", font=("font/jian.ttf", 16))
    register_password_label.place(x=50, y=170)
    register_password_entry = tk.Entry(register_window, width=20, show="*", font=("font/jian.ttf", 16))
    register_password_entry.place(x=150, y=170)

    # 定义注册按钮及其逻辑
    def do_register():
        new_username = register_username_entry.get()
        new_password = register_password_entry.get()
        if new_username and new_password:
            if new_username in users:
                messagebox.showerror("注册失败", "该用户名已存在，请选择其他用户名。")
            else:
                users[new_username] = new_password
                messagebox.showinfo("注册成功", "你已成功注册，请使用新账号登录。")
                register_window.destroy()
        else:
            messagebox.showerror("注册失败", "用户名和密码不能为空，请重新输入。")

    register_button = tk.Button(register_window, text="注册", font=("font/jian.ttf", 16), command=do_register)
    register_button.place(x=170, y=220)

# 导入图片并设置为背景
image_file = Image.open('images/1.jpg')
bg = image_file.resize((800, 600))
# 设置透明度
bg = bg.convert("RGBA")
bg.putalpha(178)
bg = ImageTk.PhotoImage(bg)
label = tk.Label(window, image=bg)
label.place(x=0, y=0, relwidth=1, relheight=1)

# 登录界面标题
title_label = tk.Label(window, text="欢迎登录", font=("font/jian.ttf", 30))
title_label.place(x=400, y=100, anchor="center")

# 用户名输入框
username_label = tk.Label(window, text="用户名：", font=("font/jian.ttf", 16))
username_label.place(x=200, y=200)
username_entry = tk.Entry(window, width=20, font=("font/jian.ttf", 16))
username_entry.place(x=300, y=200)

# 密码输入框
password_label = tk.Label(window, text="密码：", font=("font/jian.ttf", 16))
password_label.place(x=200, y=250)
password_entry = tk.Entry(window, width=20, show="*", font=("font/jian.ttf", 16))
password_entry.place(x=300, y=250)

# 登录按钮
login_button = tk.Button(window, text="登录", font=("font/jian.ttf", 16), command=login)
login_button.place(x=360, y=300)

# 注册按钮
register_link = tk.Button(window, text="注册", font=("font/jian.ttf", 16), command=register)
register_link.place(x=430, y=300)

window.mainloop()