面向对象写法

每个 frame 其实就是一张画布, 可以叠加

import tkinter as tk
from tkinter import messagebox
class Application(tk.Frame):
    def __init__(self, master=None):
        super().__init__(master, {
            'bg': 'blue'
        })
        self.master = master
        self.pack()
        self.createWidget()
    # 创建组件
    def createWidget(self):
        # 按钮
        self.btn1 = tk.Button(self, {
            'text': '送花',
            'command': self.songHua
        })
        self.btn1.pack()
    def songHua(self):
        messagebox.showinfo('songhua', '9999999999999999')
# 窗口主体
root = tk.Tk()
root.geometry("600x300+600+300")
root.title('GUI 测试')
# 子窗口
app = Application(master=root)
root.mainloop()