为什么单选按钮不能在具有多个框架的 Tkinter window 中工作？

Question

我复制了 Python 代码来创建具有多个框架的 Tkinter window。我可以毫无问题地将多种小部件放入其中，但是当我添加单选按钮时，它们的行为很有趣，尽管它们在常规 window（没有多页）中工作正常。无论我是否设置值，单选按钮的 none 都会被选中。更糟糕的是，如果我只是将鼠标指针移到单选按钮上，虽然我没有单击它，但看起来它已被选中。如果我将鼠标指针移到两个单选按钮上，它们看起来都被选中，这违反了单选按钮的多选之一规则。

我应该补充一点，我用包管理器和网格管理器尝试过这个。结果是一样的

这是我的代码的精简版：

import tkinter as tk

class MainWindow(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        # Set the title of the main window.
        self.title('Multi-frame window')
        # Set the size of the main window to 300x300 pixels.
        self.geometry('300x100')

        # This container contains all the pages.
        container = tk.Frame(self)
        container.grid(row=1, column=1)
        self.frames = {} # These are pages to which we want to navigate.

        # For each page...
        for F in (StartPage, PageOne):
            # ...create the page...
            frame = F(container, self)
            # ...store it in a frame...
            self.frames[F] = frame
            # ..and position the page in the container.
            frame.grid(row=0, column=0, sticky='nsew')

        # The first page is StartPage.
        self.show_frame(StartPage)

    def show_frame(self, name):
        frame = self.frames[name]
        frame.tkraise()

class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text='Start Page')
        label.grid(row=1, column=1)

        # When the user clicks on this button, call the
        #   show_frame method to make PageOne appear.
        button1 = tk.Button(self, text='Visit Page 1',
            command=lambda : controller.show_frame(PageOne))
        button1.grid(row=2, column=1)

class PageOne(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)

        # When the user clicks on this button, call the
        #   show_frame method to make StartPage appear.
        button1 = tk.Button(self, text='Back to Start',
            command=lambda : controller.show_frame(StartPage))
        button1.grid(row=1, column=1)
        options_label = tk.Label(self, text='Choose an option: ')
        options_label.grid(row=2, column=1)
        options_value = tk.IntVar()

        first_option = tk.Radiobutton( self , text = 'Option 1' ,
            variable = options_value , value = 1 )
        second_option = tk.Radiobutton( self , text = 'Option 2' ,
            variable = options_value , value = 2 )
        first_option.grid(row=2, column=2)
        second_option.grid(row=2, column=3)
        options_value.set(1)

if __name__ == '__main__':
    app = MainWindow()
    app.mainloop()

Answer 1

问题是 options_value 是一个本地值，它在 __init__ 完成时被销毁。

您需要保存对它的引用，例如self.options_value。

为什么单选按钮不能在具有多个框架的 Tkinter window 中工作？

Why aren't radiobuttons working in a Tkinter window with multiple frames?

python

tkinter

frame

radio-button