Question

我想使用Python 3在Tkinter创建一个蛇游戏。一切都有效，除了有时候我的苹果（一个红色的长方形）在蛇吃它之前消失了。我尝试使用print来监控删除方法，但似乎它确实可以正常工作......

这是我的代码：

from tkinter import *
import time
from random import randint


class Snake(Tk):
    def __init__(self):
        Tk.__init__(self)
        self.WIDTH = 600
        self.HEIGHT = 600

def init(self):
    self.kp = [(30,0),(30,0),(30,0),(30,0)]
    self.vx = 30
    self.vy = 0
    self.x , self.y = 300 , 300
    self.taille = 30
    self.queue = 1
    self.nb = 1
    self.pos = [(300,300)]

def init_graph(self):
    self.cnv = Canvas(self,width = self.WIDTH, height = self.HEIGHT , bg = 'white')
    self.cnv.pack()
    self.cnv.create_rectangle(self.x , self.y ,self.x+ self.taille ,self.y + self.taille , fill = 'black',tag='1')
    self.new_pomme()
    self.score()


def new_pomme(self):
    self.pomme = [randint(0,19)*30,randint(0,19)*30]
    self.cnv.create_rectangle(self.pomme[0],self.pomme[1],self.pomme[0] + self.taille,self.pomme[1] + self.taille, fill = 'red',tag = 'pomme') 


def maj(self):
    self.kp.append((self.vx,self.vy))
    self.nb += 1
    if [self.x,self.y] == self.pomme:   
        print("Pomme ! ",self.pomme)             
        self.cnv.delete('pomme')
        self.new_pomme()            
        self.queue += 1
        self.text.destroy()
        self.score()
    else:

        self.cnv.delete(str(self.nb-self.queue))
        del self.pos[0]

    self.x += self.vx           
    self.y += self.vy
    if  (self.x,self.y) in self.pos:
        self.perdu()
    else:
        self.pos.append((self.x,self.y))


    self.cnv.create_rectangle(self.x , self.y ,self.x+ self.taille ,self.y + self.taille , fill = 'black', tag =str(self.nb))
    print(round(time.clock(),2))

    if self.kp[-1] == self.kp[-2]:
        if len(self.kp) > 10:
            for i in range(5):
                del self.kp[i]
        self.after(500,self.maj)




def bouger(self):
    self.bind("<Up>", self.haut) 
    self.bind("<Down>", self.bas)
    self.bind("<Left>", self.gauche)
    self.bind("<Right>", self.droite)
    self.mainloop()

def haut(self,event):
    self.vy = -30
    self.vx = 0
    self.maj()

def bas(self,event):
    self.vy = 30
    self.vx = 0
    self.maj()

def gauche(self,event):
    self.vy = 0
    self.vx = -30
    self.maj()

def droite(self,event):
    self.vy = 0
    self.vx = 30
    self.maj()

    def perdu(self):
        print("Perdu !")
        self.text_perdu = Label(self,text='Perdu ! Score final : ' + str(self.queue-1))
        self.text_perdu.pack(side = TOP)
        Button(self,text='Recommencer',command=jeu()).pack(side = BOTTOM)


    def score(self):
        self.text = Label(self,text='Score : ' +str(self.queue-1))
        self.text.pack(side = BOTTOM)


def jeu():
    snake = Snake()
    snake.init()
    snake.init_graph()
    snake.bouger()
    snake.mainloop()

jeu()

请注意：复制/粘贴存在缩进错误，所有类中只有一个类和一个fuction jeu（）。所有其余的都在课堂内

Answer 1

每次使用“移动”而不是销毁和创建新的移动。一个简单的例子。

import Tkinter as tk
import time

root = tk.Tk()

canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()

rc1 = canvas.create_rectangle(20, 260, 120, 360,
                    outline='white', fill='blue')
rc2 = canvas.create_rectangle(20, 10, 120, 110,
                    outline='white', fill='red')

y = x = 5
for ctr in range(50):
    time.sleep(0.025)
    canvas.move(rc1, x, -y)
    canvas.move(rc2, x, y)
    canvas.update()

root.mainloop()

Python Tkinter：矩形消失但我不想

1 个答案: