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如何找到我用过的时间，并在球触底后刷新？代码是：

from tkinter import *
import random
import time

class Ball:
    def __init__(self, canvas, paddle, color):
        self.canvas = canvas
        self.paddle = paddle

        self.id = canvas.create_oval(10, 10, 25, 25, fill=color)

        starts = [-3, -2, -1, 1, 2, 3]
        random.shuffle(starts)

        self.x = starts[0]
        self.y = -3
        self.canvas_height = canvas.winfo_height()
        self.canvas_width = canvas.winfo_width()

        self.is_hitting_bottom = False

        canvas.move(self.id, 245, 100)

    def draw(self):
        self.canvas.move(self.id, self.x, self.y)

        pos = self.canvas.coords(self.id)

        if pos[1] <= 0:
            self.y = 1

        if pos[3] >= self.canvas_height:
            # self.y = -1
            self.is_hitting_bottom = True

        if self.hit_top_paddle(pos) == True:
            self.y = -3

        if self.hit_bottom_paddle(pos) == True:
            self.y = 1

        if pos[0] <= 0:
            self.x = 3

        if pos[2] >= self.canvas_width:
            self.x = -3

    def hit_top_paddle(self, pos):
        paddle_pos = self.canvas.coords(self.paddle.id)
        if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
            if pos[3] >= paddle_pos[1] and pos[3] <= paddle_pos[3]:
                return True

            return False

    def hit_bottom_paddle(self, pos):
            paddle_pos = self.canvas.coords(self.paddle.id)
            if pos[2] >= paddle_pos[0] and pos[0] <= paddle_pos[2]:
                if pos[1] >= paddle_pos[1] and pos[1] <= paddle_pos[3]:
                        return True

            return False

class Paddle:
    def __init__(self, canvas, color):
        self.canvas = canvas
        self.id = canvas.create_rectangle(0, 0, 100, 10, fill=color)

        self.x = 0
        self.canvas_width = canvas.winfo_width()

        canvas.move(self.id, 200, 300)

        canvas.bind_all('<KeyPress-Left>', self.move_left)
        canvas.bind_all('<KeyPress-Right>', self.move_right)

    def draw(self):
        self.canvas.move(self.id, self.x, 0)

        pos = self.canvas.coords(self.id)

        if pos[0] <= 0:
            self.x = 0

        if pos[2] >= self.canvas_width:
            self.x = 0

    def move_left(self, event):
        self.x = -2

    def move_right(self, event):
        self.x = 2

tk = Tk()
tk.title('Game')
canvas = Canvas(tk, width=550, height=400, bd=0, highlightthickness=0)
canvas.pack()
tk.update()

paddle = Paddle(canvas, 'blue')
ball = Ball(canvas, paddle, 'red')

while 1:
    if ball.is_hitting_bottom == False:
        ball.draw()
        paddle.draw()

    tk.update_idletasks()
    tk.update()
    time.sleep(0.01)

它应该给我一个改变或不改变的请求......所以，如果我用了x分钟并且球触到了底部，它应该问我是否要[再次躺下或注意......

4

1 回答 1

2

在您的情况下，最简单的答案是

import time

start_time= time.clock()
... code to time ...
elapsed_time= time.clock() - start_time

如果我正确理解了预期的逻辑，则可以通过以下方式将其与程序的主循环集成：

import time
play_again= 1
while play_again:
    start_time= time.clock()
    while 1:
        if ball.is_hitting_bottom == False:
            ball.draw()
            paddle.draw()
        else:
            if time.clock() - start_time > 60: break
        tk.update_idletasks()
        tk.update()
        time.sleep(0.01)
    # Ask user if to play again and leave boolean result in variable play_again
于 2013-08-05T14:48:57.133 回答