Question

我正在尝试运行在类LoginPage中切换帧的函数和函数buttonLoginClicked。似乎我想从CCTV init 方法运行的任何函数只能在LoginPage init 方法中工作，我不知道为什么。任何帮助将受到高度赞赏。

import tkinter as tk
from tkinter import ttk, messagebox
from Login import *

TITLE_FONT = ("Verdana", 12)
NORMAL_FONT = ("Verdana", 8)

class CCTV(tk.Tk):

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

        tk.Tk.iconbitmap(self, default="FittleworthLogo.ico")
        tk.Tk.wm_title(self, "Fittleworth CCTV")

        container = tk.Frame(self)
        container.pack()
        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for F in (LoginPage, PageOne):
            frame = F(container, self)
            self.frames[F] = frame
            frame.grid(column=0, row=0, sticky="nsew")

        self.show_frame(LoginPage)

    def show_frame(self, cont):

        frame = self.frames[cont]
        frame.tkraise()


class LoginPage(tk.Frame):

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

        self.labelTitle = ttk.Label(self, text="Login Page", font=TITLE_FONT)
        self.labelUsername = ttk.Label(self, text="Username", font=NORMAL_FONT)
        self.entryUsername = ttk.Entry(self, font=NORMAL_FONT)
        self.labelPassword = ttk.Label(self, text="Password", font=NORMAL_FONT)
        self.entryPassword = ttk.Entry(self, show = "*", font=NORMAL_FONT)
        self.buttonLogin = ttk.Button(self, text="Login", command=self.buttonLoginClicked)
        #self.buttonLogin = ttk.Button(self, text="Login", command=lambda: controller.show_frame(PageOne))

        self.labelTitle.grid(row=0, columnspan=2, pady=10)
        self.labelUsername.grid(row=1, column=0, sticky="w")
        self.entryUsername.grid(row=1, column=1)
        self.labelPassword.grid(row=2, column=0, sticky="w")
        self.entryPassword.grid(row=2, column=1)
        self.buttonLogin.grid(row=3, columnspan=2, pady=10)

    def buttonLoginClicked(self):
        global account
        username = self.entryUsername.get()
        password = self.entryPassword.get()

        validPassword = loggingIn(account, username, password)

        #This isn't working either
        self.buttonTest = ttk.Button(text="TEST", command=lambda: controller.show_frame(PageOne))
        self.buttonTest.grid(row=4)

        if validPassword:
            #Need to switch frames to PageOne here
            #This doens't work
            controller.show_frame(PageOne)

            #This does
            tk.messagebox.showinfo("Login successful", "You are now logged in")
        else:
            tk.messagebox.showinfo("Login error", "Incorrect username or password")



class PageOne(tk.Frame):

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

        self.labelTitle = ttk.Label(self, text="Login Page", font=TITLE_FONT)
        self.loginButton = ttk.Button(self, text="Login", command=lambda: controller.show_frame(LoginPage))

        self.labelTitle.grid(row=0, columnspan=2, pady=10)
        self.loginButton.grid(row=3, columnspan=2, pady=10)


app = CCTV()
app.geometry("800x600")
account = gettingAccountInformation()
app.mainloop()

Answer 1

我用以下内容自行解决..

在每个类的 init 方法中添加：self.controller = controller

然后调用它：self.controller.show_frame（Page）

无论如何这对我有用！

python tkinter发出运行命令

1 个答案: