从函数而不是按钮命令调用Tkinter帧控制器

Question

所以我有以下,完美的工作:

import tkinter as tk

class App(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)

        container = tk.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 (LoginPage, ProjPage):
            frame = F(container, self)
            self.frames[F] = frame
            frame.grid(row=0, column=0, rowspan=12, columnspan=6, sticky="nsew")

        self.show_frame(LoginPage)

    def show_frame(self, c):
        frame = self.frames[c]
        frame.tkraise()

class LoginPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        Btn = tk.Button(self, text="Sign In", command=lambda: controller.show_frame(ProjPage))

但我希望最后一个按钮命令位于一个单独的函数中,所以我可以先做一些评估:

        Btn = tk.Button(self, text="Sign In", command=self.signIn)

    def signIn(self):
        # do some stuff here
        self.controller.show_frame(ProjPage)

这不起作用; 无论我是否尝试通过控制器,或使用lambda,似乎没有任何工作>.<我没有得到什么？

Answer 1

你似乎并不初始化controller在self.把它放在那里__init__的LoginPage,就像这样:

self.controller = controller