关于python-tkinter的一个小demo

Python GUI编程(Tkinter)

===============================

## github项目地址：

https://github.com/zhendonger/tkinter-demo

## CSDN地址：

https://blog.csdn.net/qq_40923390/article/details/103146227

> 基于python版本 >3.0

## 安装所需库

pip3 install Pillow

## 运行效果：

1.登陆界面

2.注册界面

3.登陆成功界面

## 代码：

```python

#!/usr/bin/python

# -*- coding: UTF-8 -*-

import tkinter as tk

import tkinter.messagebox

import pickle

from PIL import Image,ImageTk

#窗口

window=tk.Tk()

window.title('欢迎进入学习系统')

# 获取屏幕宽度和高度

scn_w, scn_h = window.maxsize()

# 计算中心坐标

cen_x = (scn_w - 300) / 2

cen_y = (scn_h - 300) / 2

# 设置窗口初始大小和位置

size_xy = '%dx%d+%d+%d' % (500, 310, cen_x, cen_y)

window.geometry(size_xy) #设置窗口坐标

window.wm_attributes('-topmost',1)# 窗口置顶

#画布放置图片

canvas=tk.Canvas(window,height=300,width=500)

im=Image.open("./img/1.jpg")

imagefile=ImageTk.PhotoImage(im)

# imagefile=tk.PhotoImage(file='71.gif')

image=canvas.create_image(0,0,anchor='nw',image=imagefile)

canvas.pack(side='top')

#标签用户名密码

tk.Label(window,text='用户名:').place(x=100,y=150)

tk.Label(window,text='密码:').place(x=100,y=190)

#用户名输入框

var_usr_name=tk.StringVar()

entry_usr_name=tk.Entry(window,textvariable=var_usr_name)

entry_usr_name.place(x=160,y=150)

#密码输入框

var_usr_pwd=tk.StringVar()

entry_usr_pwd=tk.Entry(window,textvariable=var_usr_pwd,show='*')

entry_usr_pwd.place(x=160,y=190)

#登录函数

def usr_log_in():

#输入框获取用户名密码

usr_name=var_usr_name.get()

usr_pwd=var_usr_pwd.get()

#从本地字典获取用户信息，如果没有则新建本地数据库

try:

with open('usr_info.pickle','rb') as usr_file:

usrs_info=pickle.load(usr_file)

except FileNotFoundError:

with open('usr_info.pickle','wb') as usr_file:

usrs_info={'admin':'admin'}

pickle.dump(usrs_info,usr_file)

#判断用户名和密码是否匹配

if usr_name in usrs_info:

if usr_pwd == usrs_info[usr_name]:

# tk.messagebox.showinfo(title='welcome',

# message='欢迎您：'+usr_name)

show_info()

else:

tk.messagebox.showerror(message='密码错误')

#用户名密码不能为空

elif usr_name=='' or usr_pwd=='' :

tk.messagebox.showerror(message='用户名或密码为空')

#不在数据库中弹出是否注册的框

else:

is_signup=tk.messagebox.askyesno('欢迎','您还没有注册，是否现在注册')

if is_signup:

usr_sign_up()

#登陆成功展示函数

def show_info():

#新建登陆成功界面

window.withdraw()

window_info_up=tk.Toplevel(window)

size_xy = '%dx%d+%d+%d' % (500, 658, cen_x, cen_y)

window_info_up.geometry(size_xy) #设置窗口坐标

window_info_up.wm_attributes('-topmost',1)# 窗口置顶

window_info_up.title('欢迎进入魔幻世界')

#画布放置图片

canvas=tk.Canvas(window_info_up,height=987,width=658)

im=Image.open("./img/3.jpg")

imagefile=ImageTk.PhotoImage(im)

# imagefile=tk.PhotoImage(file='71.gif')

image1=canvas.create_image(0,0,anchor='nw',image=imagefile)

canvas.pack(side='top')

tk.Label(window_info_up,text='No matter how far you may fly, never forget where you come from.').place(x=25,y=100)

tk.Label(window_info_up,text='No matter how far you may fly, never forget where you come from.').place(x=25,y=140)

tk.Label(window_info_up,text='No matter how far you may fly, never forget where you come from.').place(x=25,y=180)

bt_logquit=tk.Button(window_info_up,text='退出',command=usr_sign_quit)

bt_logquit.place(x=430,y=10)

def callback():

window.destroy()

window_info_up.protocol("WM_DELETE_WINDOW", callback)

window_info_up.mainloop()

#注册函数

def usr_sign_up():

#确认注册时的相应函数

def signtowcg():

#获取输入框内的内容

nn=new_name.get()

np=new_pwd.get()

npf=new_pwd_confirm.get()

#本地加载已有用户信息,如果没有则已有用户信息为空

try:

with open('usr_info.pickle','rb') as usr_file:

exist_usr_info=pickle.load(usr_file)

except FileNotFoundError:

exist_usr_info={}

#检查用户名存在、密码为空、密码前后不一致

if nn in exist_usr_info:

tk.messagebox.showerror('错误','用户名已存在')

elif np =='' or nn=='':

tk.messagebox.showerror('错误','用户名或密码为空')

elif np !=npf:

tk.messagebox.showerror('错误','密码前后不一致')

#注册信息没有问题则将用户名密码写入数据库

else:

exist_usr_info[nn]=np

with open('usr_info.pickle','wb') as usr_file:

pickle.dump(exist_usr_info,usr_file)

tk.messagebox.showinfo('欢迎','注册成功')

#注册成功关闭注册框

window_sign_up.destroy()

#新建注册界面

window_sign_up=tk.Toplevel(window)

window_sign_up.geometry(size_xy) #设置窗口坐标

window_sign_up.wm_attributes('-topmost',1)# 窗口置顶

window_sign_up.title('注册界面')

#画布放置图片

canvas=tk.Canvas(window_sign_up,height=300,width=500)

im=Image.open("./img/2.png")

imagefile=ImageTk.PhotoImage(im)

# imagefile=tk.PhotoImage(file='71.gif')

image1=canvas.create_image(0,0,anchor='nw',image=imagefile)

canvas.pack(side='top')

#用户名变量及标签、输入框

new_name=tk.StringVar()

tk.Label(window_sign_up,text='用户名：').place(x=100,y=100)

tk.Entry(window_sign_up,textvariable=new_name).place(x=240,y=100)

#密码变量及标签、输入框

new_pwd=tk.StringVar()

tk.Label(window_sign_up,text='请输入密码：').place(x=100,y=140)

tk.Entry(window_sign_up,textvariable=new_pwd,show='*').place(x=240,y=140)

#重复密码变量及标签、输入框

new_pwd_confirm=tk.StringVar()

tk.Label(window_sign_up,text='请再次输入密码：').place(x=100,y=180)

tk.Entry(window_sign_up,textvariable=new_pwd_confirm,show='*').place(x=240,y=180)

#确认注册按钮及位置

bt_confirm_sign_up=tk.Button(window_sign_up,text='确认注册',

command=signtowcg)

bt_confirm_sign_up.place(x=240,y=220)

window_sign_up.mainloop()

#退出的函数

def usr_sign_quit():

window.destroy()

#登录注册按钮

bt_login=tk.Button(window,text='登录',command=usr_log_in)

bt_login.place(x=140,y=230)

bt_logup=tk.Button(window,text='注册',command=usr_sign_up)

bt_logup.place(x=210,y=230)

bt_logquit=tk.Button(window,text='退出',command=usr_sign_quit)

bt_logquit.place(x=280,y=230)

#主循环

window.mainloop()

```