导航 – 解决方案：Python3 Tkinter使用后退和下一个按钮从一个

问题：创建一个类似向导的程序,向用户显示一系列窗口,用户可以在窗口之间单击下一步和后退按钮.

解决方案是：

>创建一个根窗口.
>创建与要呈现给用户的窗口一样多的帧.将所有帧附加到根窗口.
>使用所需的所有小部件填充每个框架.
>当已填充所有帧时,使用grid_forget()方法隐藏每个帧,但不隐藏第一帧以使其成为可见帧.框架上的所有子窗口小部件都将隐藏在框架中.
>当用户单击窗口上的“下一个”或“后退”按钮时,调用隐藏其他帧的子例程(使用grid_forget())并使所需的帧可见(使用grid()).
>如果希望程序结束,请对根窗口使用destroy – 方法.

因此,您将创建一个窗口并在其上显示不同的框架.

(顺便说一句,开始学习tkinter的最佳地点是：http://www.tkdocs.com/tutorial/index.html)

这是Python3中的示例实现.它有3个简单的窗口,每个窗口都有一个文本标签和两个按钮,可以在不同的窗口中导航.

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#

# Creates three "windows" that the user can navigate through using Back and Next - buttons.

import tkinter
import tkinter.ttk

def create_widgets_in_first_frame():
    # Create the label for the frame
    first_window_label = tkinter.ttk.Label(first_frame,text='Window 1')
    first_window_label.grid(column=0,row=0,pady=10,padx=10,sticky=(tkinter.N))

    # Create the button for the frame
    first_window_quit_button = tkinter.Button(first_frame,text = "Quit",command = quit_program)
    first_window_quit_button.grid(column=0,row=1,sticky=(tkinter.N))
    first_window_next_button = tkinter.Button(first_frame,text = "Next",command = call_second_frame_on_top)
    first_window_next_button.grid(column=1,sticky=(tkinter.N))

def create_widgets_in_second_frame():
    # Create the label for the frame
    second_window_label = tkinter.ttk.Label(second_frame,text='Window 2')
    second_window_label.grid(column=0,sticky=(tkinter.N))

    # Create the button for the frame
    second_window_back_button = tkinter.Button(second_frame,text = "Back",command = call_first_frame_on_top)
    second_window_back_button.grid(column=0,sticky=(tkinter.N))
    second_window_next_button = tkinter.Button(second_frame,command = call_third_frame_on_top)
    second_window_next_button.grid(column=1,sticky=(tkinter.N))

def create_widgets_in_third_frame():
    # Create the label for the frame
    third_window_label = tkinter.ttk.Label(third_frame,text='Window 3')
    third_window_label.grid(column=0,sticky=(tkinter.N))

    # Create the button for the frame
    third_window_back_button = tkinter.Button(third_frame,command = call_second_frame_on_top)
    third_window_back_button.grid(column=0,sticky=(tkinter.N))
    third_window_quit_button = tkinter.Button(third_frame,command = quit_program)
    third_window_quit_button.grid(column=1,sticky=(tkinter.N))

def call_first_frame_on_top():
    # This function can be called only from the second window.
    # Hide the second window and show the first window.
    second_frame.grid_forget()
    first_frame.grid(column=0,padx=20,pady=5,sticky=(tkinter.W,tkinter.N,tkinter.E))

def call_second_frame_on_top():
    # This function can be called from the first and third windows.
    # Hide the first and third windows and show the second window.
    first_frame.grid_forget()
    third_frame.grid_forget()
    second_frame.grid(column=0,tkinter.E))

def call_third_frame_on_top():
    # This function can only be called from the second window.
    # Hide the second window and show the third window.
    second_frame.grid_forget()
    third_frame.grid(column=0,tkinter.E))

def quit_program():
    root_window.destroy()

###############################
# Main program starts here :) #
###############################

# Create the root GUI window.
root_window = tkinter.Tk()

# Define window size
window_width = 200
window_heigth = 100

# Create frames inside the root window to hold other GUI elements. All frames must be created in the main program,otherwise they are not accessible in functions. 
first_frame=tkinter.ttk.Frame(root_window,width=window_width,height=window_heigth)
first_frame['borderwidth'] = 2
first_frame['relief'] = 'sunken'
first_frame.grid(column=0,tkinter.E))

second_frame=tkinter.ttk.Frame(root_window,height=window_heigth)
second_frame['borderwidth'] = 2
second_frame['relief'] = 'sunken'
second_frame.grid(column=0,tkinter.E))

third_frame=tkinter.ttk.Frame(root_window,height=window_heigth)
third_frame['borderwidth'] = 2
third_frame['relief'] = 'sunken'
third_frame.grid(column=0,tkinter.E))

# Create all widgets to all frames
create_widgets_in_third_frame()
create_widgets_in_second_frame()
create_widgets_in_first_frame()

# Hide all frames in reverse order,but leave first frame visible (unhidden).
third_frame.grid_forget()
second_frame.grid_forget()

# Start tkinter event - loop
root_window.mainloop()