Question

好的，所以一旦满足要求，我就尝试删除画布，但出现此错误：我希望当herox达到700时背景会发生变化，我认为只有删除了旧背景后我才能这样做。

line 56, in <module>
    backgroundcanvas.delete(ALL)
AttributeError: 'int' object has no attribute 'delete'

from tkinter import *
from PIL import Image



root = Tk()
root.title("Game")

heroc = None
backgroundcanvas = None

speed = 10

def ChangeMap():
    heropos = canvas.coords(heroc)
    herox = heropos[0]
    heroy = heropos[1]
    if herox == 700:
        print("requirement met")
        backgroundcanvas.delete("all")
        backgroundcanvas.create_image(350, 200, image="background2.png")

def Move_hero(event):
    global heroc
    if event.keysym == "Up":
        canvas.move(heroc, 0, -speed)
    if event.keysym == 'Down':
        canvas.move(heroc, 0, speed)
    if event.keysym == 'Right':
        ChangeMap()
        canvas.move(heroc, speed, 0)
    if event.keysym == 'Left':
        canvas.move(heroc, -speed, 0)
        print(canvas.coords(heroc))


canvas = Canvas(root, bg="black", width=700, height=400)
canvas.pack()

heroc = None
backgroundcanvas = None

background = PhotoImage(file="background.png")
background2 = PhotoImage(file="background2.png")
backgroundcanvas = canvas.create_image(350,200,image=background)


character = PhotoImage(file="hero.png")
heroc = canvas.create_image(30, 260 ,image=character)

canvas.bind_all('<KeyPress-Up>', Move_hero)
canvas.bind_all('<KeyPress-Down>', Move_hero)
canvas.bind_all('<KeyPress-Left>', Move_hero)
canvas.bind_all('<KeyPress-Right>', Move_hero)

root.mainloop()

如果需要图像和代码中的其他内容，我将其添加：）

Answer 1

该错误告诉您确切的问题是：您试图在整数上调用delete("all")，就像您进行42.delete("all")一样，这是相同的错误。

原因是backgroundcanvas是一个整数（画布ID），而整数没有delete方法。相反，您需要调用画布的delete方法。如果要删除所有内容，则将执行canvas.delete("all")，如果仅要删除背景，则将执行canvas.delete(backgroundcanvas。

您尝试在create_image上调用backgroundcanvas的以下行也是如此。您需要在实际的画布小部件上调用它。

无法对画布使用.delete属性

1 个答案: