我是新的CustomTkinter和试图添加一个数字到一个框架。我按照网格管理器教程创建了这段代码，并尝试在框架中绘制一个图形。它运行，但不显示情节，只有框架和标题。我错过了什么？

import customtkinter
import tkinter
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import (
    FigureCanvasTkAgg, NavigationToolbar2Tk)
from matplotlib.figure import Figure
import numpy as np
customtkinter.set_appearance_mode("dark")  # Modes: "System" (standard), "Dark", "Light"
customtkinter.set_default_color_theme("green")  # Themes: "blue" (standard), "green", "dark-blue"

customtkinter.set_appearance_mode("dark")

class MyFigureFrame(customtkinter.CTkFrame):
    def __init__(self, master, title):
        super().__init__(master)
        self.grid_columnconfigure(0, weight=1)
        # self.x = x
        # self.x = y
        self.title = title

        self.title = customtkinter.CTkLabel(self, text=self.title, fg_color="gray30", corner_radius=6)
        self.title.grid(row=0, column=0, padx=10, pady=(10, 0), sticky="ew")

        fig = Figure()
        t = np.arange(0, 3, .01)
        fig.add_subplot().plot(t, 2 * np.sin(2 * np.pi * t))

        canvas = FigureCanvasTkAgg(fig, self)  # A tk.DrawingArea.
        canvas.draw()

class App(customtkinter.CTk):
    def __init__(self):
        super().__init__()

        self.title("my app")
        self.geometry("400x480")
        self.grid_columnconfigure((0, 1), weight=1)
        self.grid_rowconfigure(0, weight=1)

        self.MyFigureFrame = MyFigureFrame(self, "Figure")
        self.MyFigureFrame.grid(row=0, column=0, padx=10, pady=(10, 0), sticky="nsew")

app = App()
app.mainloop()