我是使用 Python 的圖形用戶界面的新手。在登錄頁面單擊注冊按鈕后，我能夠打開注冊頁面。
下面是代碼檔案：
login.py
from tkinter import *
from tkinter import ttk
from register import Register
class Login:
def __init__(self):
self.loginw = Tk()
self.loginw.title("Login")
self.loginw.geometry("500x500")
self.signin = Button(self.loginw,width=20, text="Register", command=self.register)
self.signin.place(relx=0.5, rely=0.5, anchor=CENTER)
def register(self):
win = Toplevel()
Register(win)
w=Login()
w.loginw.mainloop()
register.py
from tkinter import *
from tkinter import ttk
class Register:
def __init__(self, win):
self.reg = win
self.reg.title("Register")
self.reg.geometry("500x500")
self.revert = Button(self.reg,width=20, text="Return to Login")
self.revert.place(relx=0.5, rely=0.5, anchor=CENTER)
self.reg.mainloop()
有沒有辦法撰寫如下代碼：
- 在登錄頁面點擊
register按鈕后，彈出注冊頁面，登錄頁面消失。 - 在注冊頁面點擊
Return to Login按鈕后，注冊頁面消失，回傳登錄頁面。
太感謝了。
uj5u.com熱心網友回復：
取自另一個stackoverflow問題：
import tkinter as tk # python 3
from tkinter import font as tkfont # python 3
class SampleApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
self.title_font = tkfont.Font(family='Helvetica', size=18, weight="bold", slant="italic")
# the container is where we'll stack a bunch of frames
# on top of each other, then the one we want visible
# will be raised above the others
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 (StartPage, PageOne, PageTwo):
page_name = F.__name__
frame = F(parent=container, controller=self)
self.frames[page_name] = frame
# put all of the pages in the same location;
# the one on the top of the stacking order
# will be the one that is visible.
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame("StartPage")
def show_frame(self, page_name):
'''Show a frame for the given page name'''
frame = self.frames[page_name]
frame.tkraise()
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is the start page", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button1 = tk.Button(self, text="Go to Page One",
command=lambda: controller.show_frame("PageOne"))
button2 = tk.Button(self, text="Go to Page Two",
command=lambda: controller.show_frame("PageTwo"))
button1.pack()
button2.pack()
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 1", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.pack()
class PageTwo(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
label = tk.Label(self, text="This is page 2", font=controller.title_font)
label.pack(side="top", fill="x", pady=10)
button = tk.Button(self, text="Go to the start page",
command=lambda: controller.show_frame("StartPage"))
button.pack()
if __name__ == "__main__":
app = SampleApp()
app.mainloop()
在您的情況下，類 StartPage 可能是您的注冊頁面，而 PageOne 可能是您的登錄頁面。以那段代碼為基礎開始。
在 tkinter 中的兩個幀之間切換
在這種情況下，SampleApp 類就像其他框架的主框架（是一個容器）一樣。所以沒有彈出視窗。
tkinter 應用程式的另一個基本模板。取自同一鏈接：
import tkinter as tk
class SampleApp(tk.Tk):
def __init__(self):
tk.Tk.__init__(self)
self._frame = None
self.switch_frame(Register)
def switch_frame(self, frame_class):
"""Destroys current frame and replaces it with a new one."""
new_frame = frame_class(self)
if self._frame is not None:
self._frame.destroy()
self._frame = new_frame
self.geometry('925x600 ' self.screen() ' 20')
self._frame.pack()
def screen(self):
screen_width = self.winfo_screenwidth()
posX = (screen_width //2) - (925//2)
return str(posX)
class Register(tk.Frame):
def __init__(self, master):
tk.Frame.__init__(self, master)
tk.Label(self, text="This is the register Page").pack(side="top", fill="x", pady=10)
tk.Button(self, text="Login",
command=lambda: master.switch_frame(Login)).pack()
class Login(tk.Frame):
def __init__(self, master):
tk.Frame.__init__(self, master)
tk.Label(self, text="Login Page").pack(side="top", fill="x", pady=10)
self.usuario = tk.Entry(self)
self.usuario.insert(-1, 'User')
self.usuario.config(foreground='gray')
self.usuario.pack(side="top", fill="x", padx=10, ipady=3)
self.password = tk.Entry(self)
self.password.insert(-1, "Password")
self.password.config(foreground='gray')
self.password.pack(side="top", fill="x", pady=10, padx=10, ipady=3)
tk.Button(self, text="Return to register",
command=lambda: master.switch_frame(Register)).pack()
tk.Button(self, text="Login",
command=lambda: print("not implemented yet")).pack()
if __name__ == "__main__":
app = SampleApp()
app.mainloop()
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