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本章内容主要是利用python制作一个简单的桌面倒计时程序，包含开始、重置 、设置功能。

目录

一、效果演示

二、程序代码

一、效果演示

二、程序代码

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author: Roc-xb
"""import tkinter as tk
from tkinter import simpledialog
from tkinter import messageboxclass CountdownTimer:def __init__(self, root):self.root = rootself.root.title("倒计时程序")self.root.geometry("450x300")self.countdown_value = 60self.is_counting = Falseself.canvas = tk.Canvas(self.root, width=200, height=200, bg="white")self.canvas.place(x=20, y=20)self.countdown_label = tk.Label(self.root, text="倒计时: 60s", font=("Arial", 20))self.countdown_label.place(x=250, y=20)self.start_button = tk.Button(self.root, text="开始", command=self.start_countdown)self.start_button.place(x=250, y=70)self.reset_button = tk.Button(self.root, text="重置", command=self.reset_countdown)self.reset_button.place(x=250, y=120)self.set_button = tk.Button(self.root, text="设置", command=self.set_countdown)self.set_button.place(x=250, y=170)def start_countdown(self):if self.is_counting:returnself.is_counting = Trueself.countdown()def countdown(self):if self.countdown_value > 0 and self.is_counting is True:self.countdown_value -= 1self.countdown_label.config(text="倒计时: " + str(self.countdown_value) + "s")self.canvas.delete("all")self.canvas.create_rectangle(0, 200 - self.countdown_value * 2, 200, 300, fill="green")self.root.after(1000, self.countdown)elif self.countdown_value > 0 and self.is_counting is False:self.canvas.delete("all")self.is_counting = Falsereturnelse:self.is_counting = Falsemessagebox.showinfo("提示", "倒计时结束")def reset_countdown(self):self.is_counting = Falseself.countdown_value = 60self.countdown_label.config(text="倒计时: " + str(self.countdown_value) + "s")self.canvas.delete("all")def set_countdown(self):if self.is_counting:returnvalue = tk.simpledialog.askinteger("设置倒计时", "请输入倒计时时间（秒）：", parent=self.root)if value is not None:self.countdown_value = valueself.countdown_label.config(text="倒计时: " + str(self.countdown_value) + "s")self.canvas.delete("all")if __name__ == '__main__':root = tk.Tk()app = CountdownTimer(root)root.mainloop()