有没有办法继续用一只乌龟画一个正方形，同时用箭头键移动另一只乌龟？

如何解决有没有办法继续用一只乌龟画一个正方形，同时用箭头键移动另一只乌龟？

当我用箭头键移动另一只乌龟时，我试图在屏幕上缓慢移动绘图。问题是我的代码只让绘图在屏幕上移动，不允许我用键移动另一只乌龟。我尝试在 while true 语句中定义键，但结果仍然相同。

这是我的代码：

from turtle import * 
setup(500,500)
Screen()
screen = Screen()
title("Turtle Keys")
turtle1 = Turtle() 
turtle2 = Turtle()

def moving_square():
    turtle1.fillcolor("Red")
    turtle1.begin_fill()
    for i in range(4):
        turtle1.forward(50)
        turtle1.right(90)
    turtle1.end_fill()
turtle1.goto(-350,0)
turtle1.pendown()
turtle1.hideturtle()

def k1():
    turtle2.forward(50)

def k2():
    turtle2.left(45)

def k3():
    turtle2.right(45)

def k4():
    turtle2.back(25)

onkey(k1,"Up")
onkey(k2,"Left")
onkey(k3,"Right")
onkey(k4,"Down")

while True:
    moving_square()
    screen.update()         
    turtle1.forward(5)

解决方法

它需要 listen() 对按下的键做出反应。

您甚至在 onkey()

的文档中也有此信息

from turtle import * 

# --- functions ---

def moving_square():
    turtle1.fillcolor("Red")
    turtle1.begin_fill()
    for i in range(4):
        turtle1.forward(50)
        turtle1.right(90)
    turtle1.end_fill()
    
def k1():
    turtle2.forward(50)

def k2():
    turtle2.left(45)

def k3():
    turtle2.right(45)

def k4():
    turtle2.back(25)

# -- main ---

setup(500,500)
Screen()
screen = Screen()
title("Turtle Keys")
turtle1 = Turtle() 
turtle2 = Turtle()

turtle1.goto(-350,0)
turtle1.pendown()
turtle1.hideturtle()

onkey(k1,"Up")
onkey(k2,"Left")
onkey(k3,"Right")
onkey(k4,"Down")

listen()

while True:
    moving_square()
    screen.update()         
    turtle1.forward(5)
    
    

,

对于更多类似游戏的动作，我会采用不同的方式。首先，不是画一个红色的方块，而是把第一只乌龟变成一个红色的方块。其次，通过使用定时事件而不是 while True: 循环：

from turtle import Screen,Turtle

WIDTH,HEIGHT = 500,500
BLOCK_SIZE = 50
CURSOR_SIZE = 20

def k1():
    turtle.forward(50)

def k2():
    turtle.left(45)

def k3():
    turtle.right(45)

def k4():
    turtle.back(25)

def move():
    block.forward(1)

    if block.xcor() < WIDTH/2 + BLOCK_SIZE/2:
        screen.ontimer(move,75)  # milliseconds

screen = Screen()
screen.setup(WIDTH,HEIGHT)
screen.title("Turtle Keys")

block = Turtle()
block.hideturtle()
block.shape('square')
block.fillcolor('red')
block.shapesize(BLOCK_SIZE / CURSOR_SIZE)
block.penup()
block.setx(-WIDTH/2 - BLOCK_SIZE/2)
block.showturtle()

turtle = Turtle()
turtle.shape('turtle')
turtle.penup()

screen.onkey(k1,'Up')
screen.onkey(k2,'Left')
screen.onkey(k3,'Right')
screen.onkey(k4,'Down')
screen.listen()

move()

screen.mainloop()

您可以通过将 block.forward(1) 调整为更高的值来提高块的速度。如果需要拖尾线，可以放下笔。