如何在我的tkinter GUI中为选项卡定义的不同类之间传递数据?

Question

我有下面的代码，我想把Data类中的变量n传递给tab1类，作为entry1的textvariable。然而，我得到这个错误:

AttributeError: 'dict' object has no attribute 'n'

或者一般来说，我希望能够在制表符之间传递变量

import tkinter as tk
from tkinter import ttk
class Data:
def __init__(self):
self.n = tk.IntVar()
class SampleApp(tk.Tk):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.minsize(400, 400)
self.maxsize(400, 400)
self.my_notebook = ttk.Notebook(self)
self.my_notebook.pack(fill="both", expand=True)
self.app_data = {}
lst = [tab1, tab2, tab3]
for N, F in enumerate(lst):
tab = F(self.my_notebook, self.app_data)
self.my_notebook.add(tab, text="Tab"+str(N+1))
self.data = Data()

class tab1(tk.Frame):
def __init__(self, parent, data):
super().__init__(parent)
self.data = data
entry1 = tk.Entry(self, textvariable=data.n)
entry1.pack()

class tab2(tk.Frame):
def __init__(self, parent, data):
super().__init__(parent)
self.data = data
label2 = tk.Label(self, text="Tab2")
label2.pack()

class tab3(tk.Frame):
def __init__(self, parent, data):
super().__init__(parent)
self.data = data
label3 = tk.Label(self, text="Tab3")
label3.pack()
app = SampleApp()
app.mainloop()

Answer 1

您从未创建Data的实例。相反，您将self.data初始化为一个空字典。您需要创建Data的实例并将其传递给制表符。

class SampleApp(tk.Tk):
def __init__(self, *args, **kwargs):
...
self.app_data = Data()
...