Tkinter不会将映像文件更新为新目录中的映像文件

Question

我正在尝试创建一个按钮，上面有一个图像图标，它应该将图标切换到按钮单击时调用的函数中指定的图像。但是，当按下按钮时，按钮与原始图像保持不变，没有错误消息，是否有我遗漏的内容

from tkinter import *

sampleW = Tk()
sampleW.geometry("250x250")
sampleW.title("god help me")

def imageSwitch():
    icon1Directory == PhotoImage(file = r"C:\Users\txvpa\OneDrive\Desktop\hentai\Atom Projects\The Bread Exchange\bread man.png") # new image directory
    print("button has been pressed")

icon1Directory = PhotoImage(file = r"C:\Users\txvpa\OneDrive\Desktop\hentai\Atom Projects\The Bread Exchange\plus_black.png") # original image directory
icon1_photoImage = icon1Directory.subsample(7, 7)

button = Button(sampleW, relief = "ridge", padx = 70, pady = 5,image = icon1_photoImage, command = imageSwitch)
button.grid(column = 0, row = 0)

sampleW.mainloop()

Answer 1

首先，在您的代码中，此部分会导致错误：

icon1Directory == PhotoImage(file = r"C:\Users\txvpa\OneDrive\Desktop\hentai\Atom Projects\The Bread Exchange\bread man.png") # new image directory

==操作用于比较。
那么关于你的功能。创建按钮（或tkinter中的其他内容）后，应使用.config更改按钮的某些属性。
您可以对其进行编码以更改图标：

from tkinter import *
sampleW = Tk()
sampleW.geometry("250x250")
sampleW.title("god help me")

def imageSwitch():
    icon2 = PhotoImage(file=r'C:\Users\txvpa\OneDrive\Desktop\hentai\Atom Projects\The Bread Exchange\bread man.png')
    button.config(image=icon2)
    button.image = icon2

icon = PhotoImage(file=r'C:\Users\txvpa\OneDrive\Desktop\hentai\Atom Projects\The Bread Exchange\plus_black.png')
button = Button(sampleW, relief = "ridge", padx = 70, pady = 5,image = icon, command = imageSwitch)
button.grid(column = 0, row = 0)
sampleW.mainloop()

Answer 2

我认为您应该在函数中更改这一行：

icon1Directory == PhotoImage(file = r"C:\Users\txvpa\OneDrive\Desktop\hentai\Atom Projects\The Bread Exchange\bread man.png")

你写了==，但你应该写=

您的语法意味着您正在使用假返回而不是变量来生成语句