1 import tkinter as tk 2 import time 3 4 # 创建主窗口 5 window = tk.Tk() 6 window.title('进度条') 7 window.geometry('630x150') 8 9 # 设置下载进度条 10 tk.Label(window, text='下载进度:', ).place(x=50, y=60) 11 canvas = tk.Canvas(window, width=465, height=22, bg="white") 12 canvas.place(x=110, y=60) 13 14 15 # 显示下载进度 16 def progress(): 17 # 填充进度条 18 fill_line = canvas.create_rectangle(1.5, 1.5, 0, 23, width=0, fill="green") 19 x = 500 # 未知变量，可更改 20 n = 465 / x # 465是矩形填充满的次数 21 for i in range(x): 22 n = n + 465 / x 23 canvas.coords(fill_line, (0, 0, n, 60)) 24 window.update() 25 time.sleep(0.02) # 控制进度条流动的速度 26 27 # 清空进度条 28 fill_line = canvas.create_rectangle(1.5, 1.5, 0, 23, width=0, fill="white") 29 x = 500 # 未知变量，可更改 30 n = 465 / x # 465是矩形填充满的次数 31 32 for t in range(x): 33 n = n + 465 / x 34 # 以矩形的长度作为变量值更新 35 canvas.coords(fill_line, (0, 0, n, 60)) 36 window.update() 37 time.sleep(0) # 时间为0，即飞速清空进度条 38 39 40 btn_download = tk.Button(window, text='启动进度条', command=progress) 41 btn_download.place(x=400, y=105) 42 43 window.mainloop()