如何更新Tkinter标签窗口小部件的图像? [英] How to update the image of a Tkinter Label widget?

问题描述

我希望能够交换出Tkinter标签上的图像，但是除了替换小部件本身之外，我不确定该怎么做.

I would like to be able to swap out an image on a Tkinter label, but I'm not sure how to do it, except for replacing the widget itself.

当前，我可以显示如下图像:

Currently, I can display an image like so:

import Tkinter as tk
import ImageTk

root = tk.Tk()
img = ImageTk.PhotoImage(Image.open(path))
panel = tk.Label(root, image = img)
panel.pack(side = "bottom", fill = "both", expand = "yes")
root.mainloop()

但是，当用户点击时，说出ENTER键，我想更改图像.

However, when the user hits, say the ENTER key, I'd like to change the image.

import Tkinter as tk
import ImageTk

root = tk.Tk()

img = ImageTk.PhotoImage(Image.open(path))
panel = tk.Label(root, image = img)
panel.pack(side = "bottom", fill = "both", expand = "yes")

def callback(e):
    # change image

root.bind("<Return>", callback)
root.mainloop()

这可能吗?

推荐答案

方法label.configure在panel.configure(image=img)中有效.

我忘记做的是包含panel.image=img，以防止垃圾回收删除图像.

What I forgot to do was include the panel.image=img, to prevent garbage collection from deleting the image.

以下是新版本:

import Tkinter as tk
import ImageTk


root = tk.Tk()

img = ImageTk.PhotoImage(Image.open(path))
panel = tk.Label(root, image=img)
panel.pack(side="bottom", fill="both", expand="yes")

def callback(e):
    img2 = ImageTk.PhotoImage(Image.open(path2))
    panel.configure(image=img2)
    panel.image = img2

root.bind("<Return>", callback)
root.mainloop()

原始代码有效，因为图像存储在全局变量img中.

The original code works because the image is stored in the global variable img.

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