Python 3,Tkinter,如何更新按钮文本

Question

我试图使其成为当用户点击按钮时,它变为"X"或"0"(取决于他们的团队).我怎样才能使按钮上的文字更新？到目前为止,我最好的想法是删除按钮然后再次打印它们,但这只删除了一个按钮.这是我到目前为止所拥有的:

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()

Answer 1

Button小部件,就像您的Label一样,也有一个textvariable=选项.您可以使用StringVar.set()更新按钮.最小的例子:

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()

Answer 2

总结一下这个线程。button.config并且button.configure都工作！

button.config(text="hello")
or
button.configure(text="hello")

Answer 3

btn只是一个值的字典，让我们看看会发生什么：

#lets do another button example
Search_button
<tkinter.Button object .!button>
#hmm, lets do dict(Search_button)
dict(Search_button)
{'activebackground': 'SystemButtonFace', 'activeforeground': 
'SystemButtonText', 'anchor': 'center', 'background': 'SystemButtonFace', 
'bd': <pixel object: '2'>, 'bg': 'SystemButtonFace', 'bitmap': '', 
'borderwidth': <pixel object: '2'>, 'command': '100260920point', 'compound': 
'none', 'cursor': '', 'default': 'disabled', 'disabledforeground': 
'SystemDisabledText', 'fg': 'SystemButtonText', 'font': 'TkDefaultFont', 
'foreground': 'SystemButtonText', 'height': 0, 'highlightbackground': 
'SystemButtonFace', 'highlightcolor': 'SystemWindowFrame', 
'highlightthickness': <pixel object: '1'>, 'image': '', 'justify': 'center', 
'overrelief': '', 'padx': <pixel object: '1'>, 'pady': <pixel object: '1'>, 
'relief': 'raised', 'repeatdelay': 0, 'repeatinterval': 0, 'state': 
'normal', 'takefocus': '', 'text': 'Click me for 10 points!', 
'textvariable': '', 'underline': -1, 'width': 125, 'wraplength': <pixel 
object: '0'>}
#this will not work if you have closed the tkinter window

正如您所看到的，它是一个很大的值字典，因此如果您想更改任何按钮，只需执行以下操作：

Button_that_needs_to_be_changed["text"] = "new text here"

确实是这样！

即使您处于空闲状态，它也会自动更改按钮上的文本！