似乎无法在 tkinter 中添加背景图片

Question

我似乎无法将背景图片添加到我的代码中。我已经尝试了几乎所有为 tkinter 程序添加背景的解决方案，但仍然无法正常工作。我尝试过的最佳解决方案是下面的代码，它没有给出奇怪的错误，只是根本不起作用。任何帮助将不胜感激，因为我已经为此工作了几个小时而无济于事。

class App:
    def __init__(self, root):

        #setting title
        root.title("undefined")
        #setting window size
        width=1500
        height=900
        screenwidth = root.winfo_screenwidth()
        screenheight = root.winfo_screenheight()
        alignstr = '%dx%d+%d+%d' % (width, height, (screenwidth - width) / 2, (screenheight - height) / 2)
        root.geometry(alignstr)
        root.resizable(width=False, height=False)

        bg = PhotoImage(file="background.png")
        bgimg_label=tk.Label(root, image=bg)
        bgimg_label["anchor"] = "nw"
        bgimg_label.place(x=0,y=0,relwidth=1,relheight=1)

Answer 1

在 class 之外创建图像。

from tkinter import PhotoImage
import tkinter as tk


class App:
    def __init__(self, root):
        # setting title
        root.title("undefined")
        # setting window size
        width = 1500
        height = 900
        screenwidth = root.winfo_screenwidth()
        screenheight = root.winfo_screenheight()
        alignstr = '%dx%d+%d+%d' % (width, height, (screenwidth - width) / 2, (screenheight - height) / 2)
        root.geometry(alignstr)
        root.resizable(width=False, height=False)

        bgimg_label = tk.Label(root, image=bg)
        bgimg_label["anchor"] = "nw"
        bgimg_label.place(x=0, y=0, relwidth=1, relheight=1)


master = tk.Tk()
bg = PhotoImage(file='background.png')
App(master)
master.mainloop()

似乎无法在 tkinter 中添加背景图片

Can't seem to add background image in tkinter

python

tkinter

background-image