Question

我正在尝试使用tkinter的按钮在另一个图形窗口中控制乌龟，但是这些按钮不起作用

我试图使用乌龟图形和Tkinter制作一个简单的程序来控制带有按钮的乌龟。但是，似乎只有一个按钮实际上在运行一个功能，即使那样也会产生错误。这是我写的代码：

from tkinter import *
import turtle

global x
global y 

x = 1
y = 1
i = 0

root = Tk()

wn = turtle.Screen()
bob = turtle.Turtle()
bob.up()

def goUp(event):
    y=y+5
    bob.goto(x,y)
def goDown(event):
    y=y-5
    bob.goto(x,y)
def goRight(event):
    x=x+5
    bob.goto(x,y)
def goLeft(event):
    x=x-5
    bob.goto(x,y)

topFrame = Frame(root)
topFrame.pack()
middleFrame = Frame(root)
middleFrame.pack()
bottomFrame = Frame(root)
bottomFrame.pack()

button1 = Button(topFrame, text = "Up", fg="red")
button2 = Button(middleFrame, text = "Left", fg="red")
button3 = Button(middleFrame, text = "Right", fg="red")
button4 = Button(bottomFrame, text = "Down", fg="red")

button1.bind("<Button-1>", goUp)
button2.bind("<Button-2>", goLeft)
button3.bind("<Button-3>", goRight)
button4.bind("<Button-4>", goDown)
button1.pack()
button2.pack(side=LEFT)
button3.pack(side=RIGHT)
button4.pack()
root.mainloop()

Answer 1

TKinter Button类接受一个command选项，您可以在其中传递按下按钮时调用的函数。您还需要访问方法内部的全局x和y变量。

尝试以下代码：

from tkinter import *
import turtle

global x
global y 

x = 1
y = 1
i = 0

root = Tk()

wn = turtle.Screen()
bob = turtle.Turtle()
bob.up()

def goUp():
    global x, y
    y=y+5
    bob.goto(x,y)
def goDown():
    global x, y
    y=y-5
    bob.goto(x,y)
def goRight():
    global x, y
    x=x+5
    bob.goto(x,y)
def goLeft():
    global x, y
    x=x-5
    bob.goto(x,y)

topFrame = Frame(root)
topFrame.pack()
middleFrame = Frame(root)
middleFrame.pack()
bottomFrame = Frame(root)
bottomFrame.pack()

button1 = Button(topFrame, text = "Up", fg="red", command=goUp)
button2 = Button(middleFrame, text = "Left", fg="red", command=goLeft)
button3 = Button(middleFrame, text = "Right", fg="red", command=goRight)
button4 = Button(bottomFrame, text = "Down", fg="red", command=goDown)

button1.pack()
button2.pack(side=LEFT)
button3.pack(side=RIGHT)
button4.pack()
root.mainloop()

Answer 2

当使用turtle.py standalone 时，通常使用Turtle的Turtle和Screen类。当在tkinter内 embedded 中使用在tkinter顶部实现的turtle时，我们通常改用RawTurtle和TurtleScreen类。您将在the turtle documentation

中找到更多有关此的信息

由于使用不正确，您还应该查看众多online Python global keyword tutorials之一。幸运的是，我们不需要它来实现此特定程序。

这是对代码的重做，作为一个单一的窗口实现，说明了上述内容：

import tkinter as tk
from turtle import RawTurtle, TurtleScreen

def goUp():
    bob.sety(bob.ycor() + 5)

def goDown():
    bob.sety(bob.ycor() - 5)

def goRight():
    bob.setx(bob.xcor() + 5)

def goLeft():
    bob.setx(bob.xcor() - 5)

root = tk.Tk()

canvas = tk.Canvas(root, width=500, height=500)
canvas.pack()

wn = TurtleScreen(canvas)

bob = RawTurtle(wn, shape="turtle")
bob.penup()

topFrame = tk.Frame(root)
topFrame.pack()
middleFrame = tk.Frame(root)
middleFrame.pack()
bottomFrame = tk.Frame(root)
bottomFrame.pack()

tk.Button(topFrame, text="Up", fg="red", command=goUp).pack()
tk.Button(middleFrame, text="Left", fg="red", command=goLeft).pack(side=tk.LEFT)
tk.Button(middleFrame, text="Right", fg="red", command=goRight).pack(side=tk.RIGHT)
tk.Button(bottomFrame, text="Down", fg="red", command=goDown).pack()

wn.mainloop()

使用tkinter按钮在另一个窗口中控制Python乌龟

2 个答案: