Question

所以我正在制作一个Tic-Tac-Toe计划因为我很无聊。我正在使用tkinter，我有一个程序询问你想要哪一面，然后一个窗口弹出9个按钮。按下其中一个按钮时，图像将显示为 X 或 O 。然后删除该按钮。现在我正在制作程序的CPU移动部分。当按下（并删除）按钮时，它将有一个循环。一旦调用随机按钮，循环就会被打破。我的困境是：我不知道如何检查按钮是否存在，或者循环应该是什么样子。这是代码：

from tkinter import *
import sys
import time
import random

tk = Tk()

xoro = input("Choose a side, X or O.")
if xoro == "x":
    side = 0
elif xoro == "o":
    side = 1
else:
    print("Please enter x or o.")

canvas = Canvas(tk, width=498, height=498, background="green")
canvas.pack()
tk.title("Tic-Tac-Toe!")
time.sleep(2)

photo2 = PhotoImage(file="C:\Python34\X.gif")
photo1 = PhotoImage(file="C:\Python34\O.gif")
photolist = [photo2, photo1]

def PlaceImage(photo, x, y, buttontodelete):
    canvas.create_image(x,y, image=photo)
    buttontodelete.destroy()

button1 = Button(tk, text="Choose Me!")
button1 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 75, 75, button1))
button1.pack()
button1.place(bordermode=OUTSIDE, height=166, width=166)
button1.place(x=0, y=0)
button1.config(highlightbackground="black")

button2 = Button(tk, text="Choose Me!")
button2 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 75, 241, button2))
button2.pack()
button2.place(bordermode=OUTSIDE, height=166, width=166)
button2.place(x=0, y=166)
button2.config(highlightbackground="black")

button3 = Button(tk, text="Choose Me!")
button3 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 75, 407, button3))
button3.pack()
button3.place(bordermode=OUTSIDE, height=166, width=166)
button3.place(x=0, y=332)
button3.config(highlightbackground="black")

button4 = Button(tk, text="Choose Me!")
button4 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 241, 75, button4))
button4.pack()
button4.place(bordermode=OUTSIDE, height=166, width=166)
button4.place(x=166, y=0)
button4.config(highlightbackground="black")

button5 = Button(tk, text="Choose Me!")
button5 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 241, 241, button5))
button5.pack()
button5.place(bordermode=OUTSIDE, height=166, width=166)
button5.place(x=166, y=166)
button5.config(highlightbackground="black")

button6 = Button(tk, text="Choose Me!")
button6 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 241, 407, button6))
button6.pack()
button6.place(bordermode=OUTSIDE, height=166, width=166)
button6.place(x=166, y=332)
button6.config(highlightbackground="black")

button7 = Button(tk, text="Choose Me!")
button7 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 407, 75, button7))
button7.pack()
button7.place(bordermode=OUTSIDE, height=166, width=166)
button7.place(x=332, y=0)
button7.config(highlightbackground="black")

button8 = Button(tk, text="Choose Me!")
button8 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 407, 241, button8))
button8.pack()
button8.place(bordermode=OUTSIDE, height=166, width=166)
button8.place(x=332, y=166)
button8.config(highlightbackground="black")

button9 = Button(tk, text="Choose Me!")
button9 = Button(tk, text="Choose Me!", bg="green", command=lambda: PlaceImage(photolist[side], 407, 407, button9))
button9.pack()
button9.place(bordermode=OUTSIDE, height=166, width=166)
button9.place(x=332, y=332)
button9.config(highlightbackground="black")

buttonlist = [button1, button2, button3, button4, button5, button6, button7, button8, button9]
randombutton = random.randint(0, 8)
WHILE BLAH IS TRUE:
    buttonlist[randombutton].invoke()
    BREAK OUT OF LOOP, AND BEGIN USER'S TURN

mainloop()

Answer 1

.winfo_exists() 方法测试小部件的存在。

>>> from tkinter import *
>>> app = Tk()
>>> b = Button(text="hello")
>>> b.winfo_exists()
1
>>> b.destroy()
>>> b.winfo_exists()
0

尽量避免循环。您需要引发事件并允许事件循环尽可能多地运行。在Tk中， .event_generate() 方法或 .after() 调度程序方法对此非常有用。

Answer 2

不要删除按钮，只需隐藏它（使用 .pack_forget() 方法），然后检查按钮的可见性（.visible，我认为 .winfo_viewable() 方法）。

如何检查tkinter中是否存在按钮？

2 个答案: