如何定位要销毁的 tkinter 根窗口？

Question

对于我当前使用 tkinter 的项目，我需要在我的 GUI 中有多个页面，并且能够通过我在此处链接到 Switch between two frames in tkinter 的答案来实现这一点。

但是，我找不到一种方法来实现对根窗口的调用而不破坏这个预先存在的代码。我正在尝试创建一个小部件按钮来销毁根窗口，但我找不到要销毁的特定根。

from tkinter import *

class MainApp(Tk):
    """Class that displays respective frame"""
    def __init__(self):
        Tk.__init__(self)
        self.winfo_toplevel().title("YouTube Ripper and Editor")
        self.resizable(0, 0)
        container = Frame(self)
        container.pack(side="top", fill="both", expand=True)
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}
        for F in (StartPage, Downloader, Audio_Player, Config, About):
            page_name = F.__name__
            frame = F(parent=container, controller=self)
            self.frames[page_name] = frame
            frame.grid(row=0, column=0, sticky="NSEW")

        self.show_frame("StartPage")

    def show_frame(self, page_name):
        """Raise called frame"""
        frame = self.frames[page_name]
        frame.tkraise()


class StartPage(Frame):
    """Class that contains the start page"""
    def __init__(self, parent, controller):
        Frame.__init__(self, parent)
        self.configure(bg = f_color)
        self.controller = controller
        b_font = Font(family = "Franklin Gothic Book", size = 12)

        titleLabel = Label(self, text="Youtube Ripper and Editor", font = ("Franklin Gothic Book", 16,  "bold"), bg = f_color)
        titleLabel.pack(side="top", fill="x", pady= 30)

        button1 = Button(self, text="Downloader", command=lambda: controller.show_frame("Downloader"),
                            font = b_font, bg = b_color, activebackground = bp_color)
        button2 = Button(self, text="Audio Player", command=lambda: controller.show_frame("Audio_Player"),
                            font = b_font, bg = b_color, activebackground = bp_color)
        button3 = Button(self, text="MP3 Configurator", command=lambda: controller.show_frame("Config"),
                            font = b_font, bg = b_color, activebackground = bp_color)
        button4 = Button(self, text="About", command=lambda: controller.show_frame("About"),
                            font = b_font, bg = b_color, activebackground = bp_color)
        button5 = Button(self, text="Exit", command=self.exit, font = b_font, bg = b_color, activebackground = bp_color)
        # button1.pack(fill = 'x')
        # button2.pack(fill = 'x')
        # button3.pack(fill = 'x')
        # button4.pack(fill = 'x')
        button5.pack(fill = 'x')


    def exit(self):
        """Exit program"""
        MainApp.destroy()


def main():
    app = MainApp()
    app.mainloop()


main()

Answer 1

使用您在StartPage 的__init__ 中保存的对根窗口的引用，并在其上调用destroy

def exit(self):
    """Exit program"""
    self.controller.destroy()