Button text of tkinter does not work in mojave

问题

It is very simple program.

import tkinter
tkinter.Button(None, text='button').pack()
tkinter.mainloop()

I expect this program shows me such as a below picture.

But it shows a below picture actually.

When it is resized on GUI it seems working well.

It didn't occur this problem in High Sierra.

My environment is following:

macOS Mojave 10.14
Python 3.7.0

Could you advice to me?

I found out same problem on here.

回答1:

Changing Appearance to Light Mode fixed this problem for me.

To change appearance, go to Settings -> General -> Appearance -> Light Mode.

回答2:

I guess there is a bug in Tk. I am on MacOS 10.14.3 If you maximize and minimize the tkinter window the text on the button appears, another solution that worked for me is

from tkinter import *
from tkinter import ttk

button1 = ttk.Button(*your args here*)

回答3:

I also had this problem, 100% reproducible on my Mac after upgrading to Mojave and when using Homebrew's python3.

Switching to Python.org 's Python 3.7.1 package download totally eliminated the problem for me.

回答4:

I had this same exact error, and to get it fixed I had to change my buttons to ttk.Button and set a style. For example, add the following to import:

try: from tkinter import ttk # python 3
except: import ttk # python 2.7

And then after the root init:

    style = ttk.Style()
    style.map("C.TButton",
              foreground=[('pressed', 'red'), ('active', 'blue')],
              background=[('pressed', '!disabled', 'black'),
                          ('active', 'white')]
              )

Then when you are instantiating the Button:

self.button = ttk.Button(self, text="my cooool button",
                                 command=self.load_something_cool, style="C.TButton")

It worked perfectly to ensure that the text is displayed properly. Before I added the ttk bit, I was in the same boat as you in Mojave.

回答5:

Here's an example that patches up the problem for me (at least until the Python/Tkinter stuff gets cleaned up):

import tkinter
root = tkinter.Tk()
tkinter.Button(root, text='button').pack()
def fix():
    a = root.winfo_geometry().split('+')[0]
    b = a.split('x')
    w = int(b[0])
    h = int(b[1])
    root.geometry('%dx%d' % (w+1,h+1))
root.update()
root.after(0, fix)
tkinter.mainloop()

This was tested on macOS Version 10.14.2 (18C54) and Python 3.7.2 (loaded via Home-brew).

回答6:

I have this problem with an app I wrote and froze with PyInstaller. It still works fine on PC and my Mac laptop that doesn't have Mojave, but on my desktop mac that recently updated to Mojave it has buttons without text, and some buttons are completely invisible until clicked on.

I found an easy solution on Reddit: just resize the window slightly, and the interface elements appear!

Link to Reddit thread

回答7:

I had this problem only when frozen using py2app. My fix was to use .update_idletasks() on the widget, after all elements are created for each frame or Toplevel.

回答8:

Had the same issue with button text and dropdown text after packaging my program with Pyinstaller. I think its a Tk/Tcl bug. I was able to fix it by entering full screen (green button in grey bar lol) and then minimizing to normal size again (yellow button in grey bar lol).

回答9:

The only viable fix I found for py2app Tkinter windows in Mojave was to update my python version to 2.7.15 (64bit not 64/32bit). Versions prior to this all displayed empty text in the py2app frozen binaries. Directly running the python code displayed fine. Inserting .update_idletasks() prior to the mainloop of each window didn't make a difference for me (tested on two Mojave machines).