tkinter：爲什麼我的登錄窗口不在正確的位置？

Question

我做了2個窗口：main & login。我想按鈕和登錄窗口在頂層，但總是跳到主，爲什麼？ 如果我在poplogin（）中編寫代碼而不是導入模塊，則它工作正確。

main.py 
#! python3 
from tkinter import * 
from login import login 

def demo(): 
    root = Tk() 
    root.title("demo") 
    root.geometry('640x400') 
    Button(root,text='login',width=10,command=poplogin).grid(row=3,column=1,padx=10,pady=5) 
    root.mainloop() 

def poplogin(): 
    toplevel = Toplevel() 
    toplevel.grid() 
    toplevel.title('login') 
    login(toplevel) 

if __name__ == "__main__":demo() 

---

login.py 
#! python3 
from tkinter import * 

class login(Frame): 

    def __init__(self,parent=None): 
     Frame.__init__(self,parent) 
     self.creat_login() 

    def creat_login(self): 
     Label(text='email').grid(row=1) 
     user_email = Entry() 
     user_email.grid(row=1,column=1,padx=10,pady=5) 

     Label(text='password').grid(row=2) 
     user_password = Entry(show='*') 
     user_password.grid(row=2,column=1,padx=10,pady=5) 

     Button(text='login',width=10).grid(row=3,column=1,padx=10,pady=5) 


if __name__ == '__main__': 
    login().mainloop() 

Answer 1

您必須通知插件誰是它的父 - Widget(parent, ...)。如果你不這樣做，那麼tkinter使用主窗口。

在你的代碼必須使用self

而且你必須使用self.pack()顯示Frame在Toplevel

#! python3 

from tkinter import * 

class login(Frame): 

    def __init__(self, parent=None): 
     Frame.__init__(self, parent) 
     self.creat_login() 

     # show in Toplevel 
     self.pack() 

    def creat_login(self): 
     # self 
     Label(self, text='email').grid(row=1) 

     # self 
     user_email = Entry(self) 
     user_email.grid(row=1, column=1, padx=10, pady=5) 

     # self  
     Label(self, text='password').grid(row=2) 

     # self 
     user_password = Entry(self, show='*') 
     user_password.grid(row=2, column=1, padx=10, pady=5) 

     # self 
     Button(self, text='login', width=10).grid(row=3, column=1, padx=10, pady=5) 

if __name__ == '__main__': 
    login().mainloop() 

Answer 2

權代碼

from tkinter import * 

class login(Frame): 

    def __init__(self, parent=None): 
     Frame.__init__(self, parent) 
     self.creat_login(parent) 

     # With or without this line the same results,I don't know why 
     self.grid() 

    def creat_login(self,parent): 

     Label(parent, text='email').grid(row=1) 

     user_email = Entry(parent) 
     user_email.grid(row=1, column=1, padx=10, pady=5) 

     Label(parent, text='password').grid(row=2) 

     user_password = Entry(parent, show='*') 
     user_password.grid(row=2, column=1, padx=10, pady=5) 

     Button(parent, text='login', width=10).grid(row=3, column=1, padx=10, pady=5) 

if __name__ == '__main__': 
    login().mainloop()