python - 为什么我的图像按钮没有出现？

Question

我试图在我的图像背景上的特定位置放置两个图像按钮，但我的按钮没有出现。我认为他们的图像在背景之后。

我尝试使用place 和pack，都没有用。可能是什么问题？

from tkinter import*
import tkinter as tk
import settings

class Application(Frame):
    def __init__ (self, master):
        Frame.__init__(self,master)
        self.grid()
        self.create_widgets()

    def create_widgets(self):
        button1 = PhotoImage(file ="button1.gif")
        button2 = PhotoImage(file ="button2.gif")
        settings_button = Button(self, image = button1, 
                                 command = self.mult_command, width = 15)
        settings_button.place(x=1, y=1)
        rules_button = Button(self, image = button2, 
                              command = self.the_rules, width = 15)
        rules_button.place(x=50, y=50)

def main_code():
    window = Tk()
    window.title("The Bouncer")
    bg_image = PhotoImage(file ="pic.gif")
    x = Label (image = bg_image)
    x.image = bg_image
    x.place(x = 0, y = 0, relwidth=1, relheight=1)
    window.geometry("600x300")
    app = Application(window)
    window.mainloop()

main_code()

谢谢

Answer 1

很可能您的图像在显示之前正在被垃圾收集。这是一个常见的 Tkinter 陷阱。尝试更改行:

button1 = PhotoImage(file ="button1.gif")
button2 = PhotoImage(file ="button2.gif")

到

self.button1 = PhotoImage(file ="button1.gif")
self.button2 = PhotoImage(file ="button2.gif")

和使用

settings_button = Button(self, image = self.button1, command = self.mult_command, width = 15)

等等

这应该保留对您图像的引用，阻止它被垃圾收集。