Tkinter不會打開兩個以上的窗口

Question

我正在使用Tkinter在python中編寫程序。 我目前遇到的問題是我有可以打開另一個窗口的按鈕。 我的問題是它不能打開兩個以上的窗口。 有想法該怎么解決這個嗎。

from tkinter import *

class first(object):
    def __init__(self, master):
        self.master = master
        self.admin_btn = Button(master, text = "First", command = self.second)
        self.admin_btn.grid(row = 0, column = 0)

    def second(self):
        self.w = second(self.master)
        self.master.wait_window(self.w.top)

class second(object):
    def __init__(self, master):
        top = self.top = Toplevel(master)
        self.second = Button(top, text = "Second", command = self.third)
        self.second.grid(row= 0, column = 0)

    def third(self):
        self.w = third(self.master)
        self.master.wait_window(self.w.top)

class third(object):
    def __init__(self, master):
        top = self.top = Toplevel(master)
        self.second = Button(top, text = "Third")
        self.second.grid(row= 0, column = 0)


if __name__ == "__main__":
    root = Tk()
    m = first(root)
    root.mainloop()

Answer 1

嘗試使用以下代碼：

import tkinter as tk

class Demo1:
    def __init__(self, master):
        self.master = master
        self.frame = tk.Frame(self.master)
        self.button1 = tk.Button(self.frame, text = 'First', width = 25, command = self.new_window)
        self.button1.pack()
        self.frame.pack()
    def new_window(self):
        self.newWindow = tk.Toplevel(self.master)
        self.app = Demo2(self.newWindow)

class Demo2:
    def __init__(self, master):
        self.master = master
        self.frame = tk.Frame(self.master)
        self.quitButton = tk.Button(self.frame, text = 'Second', width = 25, command = self.close_windows)
        self.quitButton.pack()
        self.frame.pack()
    def close_windows(self):
        self.master.destroy()

def main(): 
    root = tk.Tk()
    app = Demo1(root)
    root.mainloop()

if __name__ == '__main__':
    main()

在這段代碼中，我添加了兩個窗口，但是您可以添加第三個窗口。

Answer 2

你忘了第二個窗口

self.master = master

當您嘗試打開第三個窗口時，您會收到錯誤消息。

但是，您應該將Toplevel(master)分配給self. master self. master ，然后使用self.master而不是self.top

from tkinter import *


class First(object):

    def __init__(self, master):
        self.master = master # = Tk()
        self.btn = Button(self.master, text="First", command=self.second)
        self.btn.grid(row=0, column=0)

    def second(self):
        self.w = Second(self.master)
        self.master.wait_window(self.w.master)


class Second(object):

    def __init__(self, master):
        self.master = Toplevel(master)
        self.btn = Button(self.master, text="Second", command=self.third)
        self.btn.grid(row=0, column=0)

    def third(self):
        self.w = Third(self.master)
        self.master.wait_window(self.w.master)


class Third(object):

    def __init__(self, master):
        self.master = Toplevel(master)
        self.btn = Button(self.master, text="Third")
        self.btn.grid(row=0, column=0)


if __name__ == "__main__":
    root = Tk()
    first = First(root)
    root.mainloop()

現在所有類看起來都非常相似-它們具有self.master = Tk()或self.master = Toplevel(master)

---

BTW：使用CamelCase的類名- First ， Second ， Third -它有助於識別代碼類。

Answer 3

我建議您所有的類都繼承自Toplevel而不是對象，這樣，您的所有類都將具有master屬性（這就是您出錯的原因， second類沒有錯誤）：

from tkinter import *

class First(Toplevel):
    def __init__(self, master):
        Toplevel.__init__(self, master)
        self.admin_btn = Button(self, text = "First", command = self.second)
        self.admin_btn.grid(row=0, column=0)

    def second(self):
        self.w = Second(self)
        self.wait_window(self.w)

class Second(Toplevel):
    def __init__(self, master):
        Toplevel.__init__(self, master)
        self.second = Button(self, text = "Second", command = self.third)
        self.second.grid(row=0, column=0)

    def third(self):
        self.w = Third(self.master)
        self.wait_window(self.w)

class Third(Toplevel):
    def __init__(self, master):
        Toplevel.__init__(self, master)
        self.second = Button(self, text = "Third")
        self.second.grid(row=0, column=0)


if __name__ == "__main__":
    root = Tk()
    m = First(root)
    m.lift(root)
    root.wait_window(m)
    root.mainloop()