为什么这些图像正在消失，我如何修复它(python)？
为什么这些图像正在消失，我如何修复它(python)？
提问于 2021-07-30 03:30:15
我目前正在一个程序中做Tkinter和图像方面的工作。我想同时在屏幕上显示9个图像，但是只有一个图像(最后一个)会同时出现在屏幕上。我在这段代码中隔离了问题，所以这是导致这个问题的代码的一部分。“下载”功能接收来自互联网的图像，然后"ext“获取下载的图像，并将它们放到屏幕上，但并不是所有的图像都继续运行。
import tkinter as tk
from tkinter.ttk import *
from threading import *
import random
from io import BytesIO
import urllib
import urllib.request
from PIL import Image, ImageTk
class CardClass:
def __init__(self):
self.master = tk.Tk()
self.master.attributes('-zoomed', True)
self.frame = Frame(self.master)
self.frame.pack()
self.state = False
self.master.attributes("-fullscreen", True)
self.but = Button(self.master, text="Print Images", command=self.Hand, pad = 150)
self.but.pack(pady = 12)
self.cardsList = ["https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg", "https://post.medicalnewstoday.com/wp-content/uploads/sites/3/2020/02/322868_1100-800x825.jpg", "https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg", "https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg", "https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg", "https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg", "https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg","https://post.medicalnewstoday.com/wp-content/uploads/sites/3/2020/02/322868_1100-800x825.jpg","https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg","https://post.medicalnewstoday.com/wp-content/uploads/sites/3/2020/02/322868_1100-800x825.jpg","https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg","https://post.medicalnewstoday.com/wp-content/uploads/sites/3/2020/02/322868_1100-800x825.jpg","https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg","https://post.medicalnewstoday.com/wp-content/uploads/sites/3/2020/02/322868_1100-800x825.jpg","https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg","https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg","https://www.thoughtco.com/thmb/O8fvqeXnAtOZ_L4eQ-aCRFKou_I=/768x0/filters:no_upscale():max_bytes(150000):strip_icc()/atlantic-bottlenose-dolphin--jumping-high-during-a-dolphin-training-demonstration-154724035-59ce93949abed50011352530.jpg"]
def Hand(self):
self.but.destroy()
self.newCard = random.sample(self.cardsList, k=9)
self.slot1 = self.cardsList[0]
self.slot2 = self.cardsList[1]
self.slot3 = self.cardsList[2]
self.slot4 = self.cardsList[3]
self.slot5 = self.cardsList[4]
self.slot6 = self.cardsList[5]
self.slot7 = self.cardsList[6]
self.slot8 = self.cardsList[7]
self.slot9 = self.cardsList[8]
self.ext()
def download(self, url, ex, ey):
print("here1")
with urllib.request.urlopen(url) as u:
raw_data = u.read()
img = Image.open(BytesIO(raw_data))
self.iimage = ImageTk.PhotoImage(img.resize((50,50), Image.ANTIALIAS))
lala = tk.Label(image=self.iimage)
lala.place(x=ex, y=ey)
return self.iimage
def ext(self):
self.download(self.newCard[0], 50, 150)
self.download(self.newCard[1], 100, 150)
self.download(self.newCard[2], 150, 150)
self.download(self.newCard[3], 200, 150)
self.download(self.newCard[4], 150, 150)
self.download(self.newCard[5], 300, 150)
self.download(self.newCard[6], 350, 150)
self.download(self.newCard[7], 400, 150)
self.download(self.newCard[8], 450, 150)
if __name__ == '__main__':
w = CardClass()
w.master.mainloop()有人知道为什么会这样吗？谢谢!
回答 1
Stack Overflow用户
回答已采纳
发布于 2021-07-30 04:31:31
我想我不明白为什么会这样，但问题是，实际上，当函数结束时，ImageTk.PhotoImage实例就会消失。不应该是这样的。-- Label小部件应该保存一个保持其活力的引用，但是如果您将这些PhotoImage对象存储在一个列表中，如下所示，代码可以工作：
def Hand(self):
self.but.destroy()
self.newCard = random.sample(self.cardsList, k=9)
self.keep = []
self.ext()
def download(self, url, ex, ey):
with urllib.request.urlopen(url) as u:
raw_data = u.read()
img = Image.open(BytesIO(raw_data)).resize((50,50),Image.ANTIALIAS)
iimage = ImageTk.PhotoImage(img)
Label(self.master, image=iimage).place(x=ex,y=ey)
self.keep.append(iimage)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/68585128
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