由反弹球和球拍构成的游戏。球会在屏幕上飞过来,玩家要用球拍把它弹回去 画布和画弹球
#创建Ball
class Ball:
def __init__(self, canvas,color):
self.canvas = canvas
self.id = canvas.create_oval(10,10,25,25,fill=color)
self.canvas.move(self.id,245,100)
#
starts = [-3,-2,-1,1,2,3]
random.shuffle(starts)
self.x = starts[0]
self.y = -3
#取得当前画布的大小
self.canvas_height = self.canvas.winfo_height()
self.canvas_width = self.canvas.winfo_width()
def draw(self):
#添加移动: move(id-物体,水平移动,垂直移动)
self.canvas.move(self.id,self.x,self.y)
pos = self.canvas.coords(self.id)
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 = -3
主程序的代码分析:
while 1:
ball.draw() #引入移动操作
tk.update_idletasks() #和update 合作 让tkinter快点把物体画出来
tk.update()
time.sleep(0.05)