#coding:utf-8
from tkinter import *import random
import timeclassBall:
#创建一个球类
def __init__(self, canvas, color):
self.canvas=canvas
self.id= canvas.create_oval(10, 10, 25, 25, fill=color)
#返回刚好划小球的id，create_oval创建一个椭圆
self.canvas.move(self.id,245, 100)
#把椭圆移动到画布
starts= [-3, -2, -1, 1, 2, 3]
random.shuffle(starts)
#随机排列
self.x= starts[0]
self.y= -3self.canvas_height=self.canvas.winfo_height()
#获取画布当前高度
self.canvas_width=self.canvas.winfo_width()
#获取画布当前宽度
def draw(self):
self.canvas.move(self.id, self.x, self.y)
#让小球水平和垂直移动
pos=self.canvas.coords(self.id)
#coords返回画布上画好的x和y坐标
#判断小球是否撞到画布顶部或者底部，保证小球反弹回去，不消失if pos[1] <= 0:
self.y= 3
if pos[3] >=self.canvas_height:
self.y= -3
if pos[0] <= 0:
self.x= 3
if pos[2] >=self.canvas_width:
self.x= -3tk=Tk()
tk.title("Game")
tk.resizable(0, 0)
#窗口大小不可调整
tk.wm_attributes("-topmost", 1)
#使画布窗口置于所有窗口之前
canvas= Canvas(tk,width=500, height=400, bd=0, highlightthickness=0)
#bd和highlighttthickness是为了保证画布没有边框
canvas.pack()
tk.update()
#动画初始化
ballone= Ball(canvas, 'red')
balltwo= Ball(canvas, 'blue')while 1:
#画布一出现会马上消失，为了防止画布消失，用tkinter一直重画
ballone.draw()
balltwo.draw()
tk.update_idletasks()
tk.update()
time.sleep(0.01)