在没有按钮的情况下在 tkinter 上更改图像

Question

谁能解释我如何正确使用主循环？ 我正在尝试根据条件更新图像，问题是一切似乎都可以正常工作，但画布上的图像没有改变。

from tkinter import *

class Panel():
    def __init__(self, master):
        self.master=master
        self.frame1= Frame(master, width=500, height=500)
        self.frame1.pack()

        self.canvas1 = Canvas(self.frame1, width=1000, height=1000)
        self.canvas1.grid(row=0 , column=0)
        self.canvas1.pack()
        self.images=[]
        self.images.append(PhotoImage(file="download-icones-png-1.png"))
        self.images.append(PhotoImage(file="Download-Icon.png"))
        self.number = 0
        self.image_on_canvas = self.canvas1.create_image(0, 0, anchor = NW, image = self.images[self.number])
        #self.update_image()

    def update_image(self):
        if(self.number == 1):
            print("Current number is:",self.number)
            self.canvas1.itemconfig(self.image_on_canvas, image=self.images[self.number])
            self.number = 0
            print("The number change to:", self.number)
            self.canvas1.after(2000, self.update_image)
        elif(self.number==0):
            print("Current number is:",self.number)
            self.number = 1
            self.canvas1.itemconfig(self.image_on_canvas, image=self.images[self.number])
            print("The number change to:", self.number)
            self.canvas1.after(2000, self.update_image)


def Main():
     root = Tk()
     cp=Panel(root)
     cp.update_image()
     root.mainloop()

Main()

谢谢

解决方案：

self.canvas1.after(2000, self.update_image) 

必须在 if 语句之外

Answer 1

嘿，出现这个问题是因为在将图像设置为标签后，它会收集一个垃圾值，这就是我们无法更改它的原因，但您可以通过这样做来完成您的工作：

#First in your command line type this -- pip install pillow
from PIL import Image, ImageTK
image= Image.open(image_path)
photo = ImageTk.PhotoImage(image)
""" 
Here instead of PhotoImage(file=PATH) use the above and 
then as you have done in your code just append it in the 
list . -- enjoy 
"""