如何在 toplevel() Tkinter 中使用画布制作按钮

问题描述

我正在尝试在 Tkinter 的 canvas.create_window 中使用 toplevel() 制作按钮。按钮用于返回主窗口。显示第一个“开始”按钮，但不显示第二个“返回”按钮。代码如下。

from tkinter import *

win = Tk()

def play_button():
    win.withdraw()
    top = Toplevel()
    top.geometry("300x300")
    button_back = Button(top,text="Back",command=back_button)

    canvas_two = Canvas(top,width = 300,height = 300)    
    canvas_two.pack(fill="both",expand=True)         
    Button_reverse = canvas_two.create_window(0,anchor="nw",window=button_back)
    top.resizable(False,False)

def back_button():
    win.deiconify()

win.geometry("300x300")

canvas = Canvas(win,height = 300)
canvas.pack(fill="both",expand=True)      
button_play = Button(win,text="Play",command=play_button)
Play_button = canvas.create_window(0,window=button_play )

win.mainloop()

解决方法

问题在于 canvas_two 和 button_back 的创建顺序。您需要先创建 Canvas，然后将 Button 放在上面，如下所示。

def play_button():
    win.withdraw()
    top = Toplevel()
    top.geometry("300x300")

    canvas_two = Canvas(top,width=300,height=300)
    canvas_two.pack(fill="both",expand=True)

    button_back = Button(top,text="Back",command=back_button)
    Button_reverse = canvas_two.create_window(0,anchor="nw",window=button_back)
    top.resizable(False,False)