In tkinter, why winfo_height() always return 1?

问题:

This is the most easy example.

#py3 from tkinter import * tk = Tk() canvas = Canvas(tk, width= 500 , height = 400) canvas.winfo_height() #In [4]: canvas.winfo_height() #Out[4]: 1 

回答1:

You have to pack the canvas element in the window before getting it's height. The height return is the actual height.

>>> from tkinter import *  >>> tk = Tk() >>> canvas = Canvas(tk, width= 500 , height = 400) >>> canvas.winfo_height() 1 >>> canvas.pack() >>> canvas.winfo_height() 402 

回答2:

If it doesn't work by using pack() function, you can try to add canvas.update() after using canvas.pack().

文章来源: In tkinter, why winfo_height() always return 1?