渲染具有多个帧的类对象时不显示Tkinter图像

import tkinter as tk

class MyFrame(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.master = master
        self.pack()
        self.create_widgets()

    def create_widgets(self):
        # 创建并添加组件到窗口中
        ...

if __name__ == '__main__':
    root = tk.Tk()
    frame = MyFrame(master=root)
    frame.mainloop()  # 启动Tkinter的主循环

import tkinter as tk

class MyFrame(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master)
        self.master = master
        self.pack()
        self.create_widgets()

    def create_widgets(self):
        # 创建并添加组件到窗口中
        ...

    def update_frame(self):
        # 更新类对象的帧
        ...

        # 更新Tkinter界面
        self.master.update()  # 或者使用self.master.update_idletasks()

if __name__ == '__main__':
    root = tk.Tk()
    frame = MyFrame(master=root)

    while True:
        frame.update_frame()

    root.mainloop()