tkinter 在画布上移动对象

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问题描述

我是 Python 新手.我正在尝试在画布上实现简单的对象移动.

I'm new in python. I'm trying to achieve a simple object movement on canvas.

这个想法是简单地更新 X、Y 坐标并重新绘制椭圆.

The idea is to simply update X, Y coordinates and redraw the oval.

每次更新坐标时我都尝试使用 canvas.update() 但它不能这样工作.

I've tried to use canvas.update() every time I update coordinates but it doesn't work this way.

class character():
    x = 10
    y = 10
    color = "red"
    canvas.create_oval(x, y, x + 40, y + 40, fill=color)


def moveup():
    character.y -= 10
def moveright():
    character.x += 10
def movedown():
    character.y += 10
def moveleft():
    character.x -= 10


def choose():
    choosen_move = randint(0, 4)

    if choosen_move == 0:
        moveup()
    elif choosen_move == 1:
        moveright()
    elif choosen_move == 2:
        movedown()
    elif choosen_move == 3:
        moveleft()

    print "%s | %s" % (character.x, character.y)
    canvas.update()
    sleep(1)


while True:
    choose()
root.mainloop()

推荐答案

代替 character.x += 10 或 character.y -= 10，你需要使用 move:

Instead of character.x += 10 or character.y -= 10, you need to use move:

canvas.move(oval, 10, 0)   #  for x += 10
canvas.move(oval, 0, -10)  #  for y -= 10

剩下的应该跟上.

代替 Character 类，您可以只说 oval = canvas.create_oval(x, y, x + 40, y + 40, fill=color).

Instead of a Character class, you can just say oval = canvas.create_oval(x, y, x + 40, y + 40, fill=color).

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