Python 3，Tkinter，如何更新按钮文本 [英] Python 3, Tkinter, How to update button text

问题描述

我试图让它在用户点击按钮时变成X"或0"(取决于他们的团队).我怎样才能使按钮上的文本更新?到目前为止，我最好的想法是删除按钮然后再次打印它们，但这只会删除一个按钮.这是我到目前为止所拥有的:

Im trying to make it so that when the user clicks a button, it becomes "X" or "0" (Depending on their team). How can I make it so that the text on the button is updated? My best idea so far has been to delete the buttons then print them again, but that only deletes one button. Here's what I have so far:

from tkinter import *

BoardValue = ["-","-","-","-","-","-","-","-","-"]

window = Tk()
window.title("Noughts And Crosses")
window.geometry("10x200")

v = StringVar()
Label(window, textvariable=v,pady=10).pack()
v.set("Noughts And Crosses")

def DrawBoard():
    for i, b in enumerate(BoardValue):
        global btn
        if i%3 == 0:
            row_frame = Frame(window)
            row_frame.pack(side="top")
        btn = Button(row_frame, text=b, relief=GROOVE, width=2, command = lambda: PlayMove())
        btn.pack(side="left")

def PlayMove():
    BoardValue[0] = "X"
    btn.destroy()
    DrawBoard()

DrawBoard()
window.mainloop()

推荐答案

按钮小部件，就像你的标签一样，也有一个 textvariable= 选项.您可以使用 StringVar.set() 更新按钮.最小示例:

The Button widget, just like your Label, also has a textvariable= option. You can use StringVar.set() to update the Button. Minimal example:

import tkinter as tk

root = tk.Tk()

def update_btn_text():
    btn_text.set("b")

btn_text = tk.StringVar()
btn = tk.Button(root, textvariable=btn_text, command=update_btn_text)
btn_text.set("a")

btn.pack()

root.mainloop()

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