试图添加一个功能类似于按钮的图像，但是这个错误，图像“pyimage2”不存在，弹出

Question

我已经有一组代码类似于下面的格式，这似乎有效。但不知何故，这个图像并没有出现。它们与代码位于同一文件夹中。 Def small是使图像工作的代码，def stripe是给我一个错误的代码。

from tkinter import *
import tkinter as tk
from tkinter import ttk

def small():
    s = Tk()
    s.title('Small Preset Shirt (Not fit to scale)')
    canvas = Canvas(s, width = 800, height = 100)
    canvas.pack()
    b1=ttk.Button(s,text='Click to Start', command = questions)
    b1.pack()
    photo = PhotoImage(file = 'small.png')
    b1.config(image=photo,compound=RIGHT)
    s.mainloop()

def stripes():
    stripes = Tk()
    stripes.title('Black Shirt with Stripes')
    canvas = Canvas(stripes, width = 800, height = 100)
    canvas.pack()
    b2=ttk.Button(stripes,text='Click to See Final Price', command = final)
    b2.pack()
    photo = PhotoImage(file = 'stripes.png')
    b2.config(image=photo,compound=RIGHT)
    stripes.mainloop()

---

这是完整的Traceback：

Exception in Tkinter callback
Traceback (most recent call last):
File              "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/tkinter        /__init__.py", line 1705, in __call__
return self.func(*args)
File "/Users/Business/Documents/Python/small.py", line 159, in  stripes
b2.config(image=photo,compound=RIGHT)
File  "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/tkinter.   /__init__.py", line 1485, in configure
return self._configure('configure', cnf, kw)
File   "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/tkinter.   /__init__.py", line 1476, in _configure
self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
_tkinter.TclError: image "pyimage2" doesn't exist

Answer 1

当你收到错误消息“_tkinter.TclError: image "pyimage2" doesn't exist”或类似的东西时，这意味着tkinter无法决定它是哪个窗口的照片。这是由于多个Tk()窗户。当你使用多个Tk时，很少有其他东西会产生问题，这就是为什么Tkinter有另一种类型的窗口Toplevel并且它像主窗口一样引用主窗口。

让我们来看看你的代码..

在这里，我看到除了那个错误之外的其他几个问题。

1. 就像我说的不只是一个Tk()窗口。我相信你可能有两个以上。
2. 如果你有一个主窗口，并决定用Toplevel打开更多，那么请不要使用另一个mainloop()一个足以打开尽可能多的Toplevel窗口，但记得在代码的末尾使用至少一个mainloop()。
3. 有时当你在一个函数中定义一个Photoimage，该函数将图像存储在局部变量中时，即使它被Label或Canvas显示，图像也会被python清除。因此，总是在这种情况下创建一个引用。

由于您的代码不可运行，因此我添加了必要的东西来运行和测试它。

from tkinter import *
from tkinter import ttk

Main_window = Tk()  # Make only one Tk main window 
Main_window.geometry('300x150')
Main_window.title("Get Shirts (Buy 1 get 1 Free)")

def small():
    s = Toplevel()   # For secondary window use Toplevel 
    s.title('Small Preset Shirt (Not fit to scale)')
    canvas = Canvas(s, width = 800, height = 100)
    canvas.pack()
    b1=ttk.Button(s,text='Click to Start', command = None)
    b1.pack()
    photo = PhotoImage(file = 'logo.png')
    b1.img_ref = photo      # Create a reference 
    b1.config(image=photo,compound=RIGHT)
    # s.mainloop()      # Don't use mainloop more than once


def stripes():
    stripes = Toplevel()  # For secondary window use Toplevel 
    stripes.title('Black Shirt with Stripes')
    canvas = Canvas(stripes, width = 800, height = 100)
    canvas.pack()
    b2=ttk.Button(stripes,text='Click to See Final Price', command = None)
    b2.pack()
    photo = PhotoImage(file = 'logo.png')
    b2.img_ref = photo      # Sometimes images in functions becomes garbage value.
    b2.config(image=photo,compound=RIGHT)
    # stripes.mainloop()      # Using two of these will do nothnig.


Category_Lb = Label(Main_window, text='Category', font=('',25))
Category_Lb.pack()

Cate_1 = ttk.Button(Main_window, text='Small Preset Shirt', command=small)
Cate_1.pack()

Cate_2 = ttk.Button(Main_window, text='Black Shirt with Stripes', command=stripes)
Cate_2.pack()


Main_window.mainloop()