如果画布对象到达某个坐标，如何设置if语句？ tkinter

Question

我正在使用TKINTER制作蛇游戏，如果蛇碰到窗口，我正在尝试打印出“ Over Over”消息。我该怎么做？

这是我到目前为止得到的：

from tkinter import *
# import random, disregard random module, unused

def up(event):
    canvas.move(snakebody, 0, -20)

def down(event):
    canvas.move(snakebody, 0, 20)

def left(event):
    canvas.move(snakebody, -20, 0)

def right(event):
    
    canvas.move(snakebody, 20, 0)

# root
window = Tk()

window.config(bg='darkgreen')
window.geometry('450x450')
window.resizable(0, 0)

# canvas
canvas = Canvas(window, bg='darkgreen', borderwidth=0)
canvas.pack(fill=BOTH, expand=1)

# snake body/head
snakebody = canvas.create_rectangle(100, 50, 50, 100, outline='lightgreen', fill='lightgreen')

# game over message
if canvas.coords(snakebody) == canvas.coords(snakebody, 50, 50, 100, 100):
    print('game over')

# control binds
window.bind('<Up>', up)
window.bind('<Down>', down)
window.bind('<Left>', left)
window.bind('<Right>', right)

window.mainloop()

请帮忙

Answer 1

我认为现在的问题还为时过早。您之前需要回答不同的问题。您的动作永远不会让您认为蛇咬伤本身。您的蛇也不会在角落里移动。因此，您很可能必须更改该功能。无论如何，向您展示了我在评论部分中提到的内容的概念。

我已经实现了一个称为after_tick（）的函数。在函数的内部，我通过询问画布的属性来定义（0,0）=左上角的边界和宽度和高度的最大坐标。之后，我向画布询问此 box 的项目，如果snakebody不在内部的ID，请通过打印 game。

其他建议：

• ，tick通常是自动化的下一步
• 实现
• 功能tick

from tkinter import *

def after_tick():
    max_w = canvas.winfo_width()
    max_h = canvas.winfo_height()
    in_cnvs = canvas.find_enclosed(0,0,max_w,max_h)
    if snakebody not in in_cnvs:
        print('game over')    

def move_event(event):
    key = str(event.keysym)
    if key == 'Up':
        canvas.move(snakebody, 0, -20)
    elif key == 'Down':
        canvas.move(snakebody, 0, 20)
    elif key == 'Left':
        canvas.move(snakebody, -20, 0)
    elif key == 'Right':
        canvas.move(snakebody, 20, 0)
    after_tick()


window = Tk()
window.config(bg='darkgreen')
window.geometry('450x450')
window.resizable(0, 0)

canvas = Canvas(window, bg='darkgreen', borderwidth=0)
canvas.pack(fill=BOTH, expand=1)

snakebody = canvas.create_rectangle(100, 50, 50, 100,
                                    outline='lightgreen',
                                    fill='lightgreen')

window.bind('<Up>', move_event)
window.bind('<Down>', move_event)
window.bind('<Left>', move_event)
window.bind('<Right>', move_event)

window.mainloop()