选择不同的 Radiobutton 时如何删除第一个 Radiobutton 的效果？

Question

我想为我的代码组织 GUI，它有 2 个部分。我通过添加Radiobutton s组织它，其中选择一个时，它仅显示“第1节”。而当另一个Radiobutton被选中时，它应该不显示“Section 1”，而只显示“Section 2”。

这就是想法，一切顺利，除了如果我更改Radiobutton 选择，它会显示两个部分。

如何让它一次只显示一个？

这是一个可以运行的示例代码：

from tkinter import *

def main():
    root = Tk()
    app = Window(root)
    root.mainloop()


class Window():
    def __init__(self, master):
        self.master=master
        self.master.title("Test")
        self.master.geometry('1000x700')

        self.Radio=Label (self.master, text="Select Method", bg='Lavender')
        self.RadioFrame=LabelFrame(self.master, width=230, height=150, labelwidget=self.Radio, bg='lavender')
        self.RadioFrame.place(x=200, y=35)

        selection = IntVar()
        selection.set(0)
        r1 = Radiobutton(self.RadioFrame, text="Option 1", variable=selection, value=1, command=lambda: Clicked(selection.get()), bg='lavender').pack()
        r2 = Radiobutton(self.RadioFrame, text="Option 2", variable=selection, value=2, command=lambda: Clicked(selection.get()), bg='lavender').pack()

        def Clicked(variable):

            if selection.get() ==1:
                self.label_1=Label (self.master, text="label 1", bg='lavender')
                self.label_1Frame=LabelFrame(self.master, width=230, height=90, labelwidget= self.label_1, bg='lavender')
                self.label_1Frame.place(x=490, y=35)

            elif selection.get() ==2:
                self.label_2=Label (self.master, text="label_2", bg='lavender')
                self.label_2Frame=LabelFrame(self.master, width=230, height=60, labelwidget= self.label_2, bg='lavender')
                self.label_2Frame.place(x=490, y=340)

#root.mainloop()
if __name__=='__main__':
    main()

Answer 1

单击单选按钮时，您创建了新的LabelFrame。您应该先创建两个标签框而不显示它们，然后根据单选按钮的选择显示一个：

class Window():
    def __init__(self, master):
        self.master=master
        self.master.title("Test")
        self.master.geometry('1000x700')

        self.Radio=Label (self.master, text="Select Method", bg='Lavender')
        self.RadioFrame=LabelFrame(self.master, width=230, height=150, labelwidget=self.Radio, bg='lavender')
        self.RadioFrame.place(x=200, y=35)

        selection = IntVar()
        selection.set(0)
        r1 = Radiobutton(self.RadioFrame, text="Option 1", variable=selection, value=1, command=lambda: Clicked(selection.get()), bg='lavender').pack()
        r2 = Radiobutton(self.RadioFrame, text="Option 2", variable=selection, value=2, command=lambda: Clicked(selection.get()), bg='lavender').pack()

        # create the two label frames without showing them
        self.label_1=Label (self.master, text="label 1", bg='lavender')
        self.label_1Frame=LabelFrame(self.master, width=230, height=90, labelwidget= self.label_1, bg='lavender')

        self.label_2=Label (self.master, text="label_2", bg='lavender')
        self.label_2Frame=LabelFrame(self.master, width=230, height=60, labelwidget= self.label_2, bg='lavender')

        def Clicked(selected):

            if selected ==1:
                self.label_1Frame.place(x=490, y=35) # show label frame 1
                self.label_2Frame.place_forget() # hide label frame 2

            elif selected ==2:
                self.label_1Frame.place_forget() # hide label frame 1
                self.label_2Frame.place(x=490, y=340) # show label frame 2

Answer 2

你可以这样使用：

try:
    self.any_widget.destroy()
except AttributeError:
    pass

销毁任何小部件。
所以，我已经更正了你的代码：

from tkinter import *  

def main():    
    root = Tk()
    app = Window(root)
    root.mainloop()


class Window():
    def __init__(self, master):
        self.master=master
        self.master.title("Test")
        self.master.geometry('1000x700')

        self.Radio=Label (self.master, text="Select Method", bg='Lavender')
        self.RadioFrame=LabelFrame(self.master, width=230, height=150, labelwidget=self.Radio, bg='lavender')
        self.RadioFrame.place(x=200, y=35)

        selection = IntVar()
        selection.set(0)
        r1 = Radiobutton(self.RadioFrame, text="Option 1", variable=selection, value=1, command=lambda: Clicked(selection.get()), bg='lavender').pack()
        r2 = Radiobutton(self.RadioFrame, text="Option 2", variable=selection, value=2, command=lambda: Clicked(selection.get()), bg='lavender').pack()

        def Clicked(variable):
    
            if selection.get() ==1: 
                self.label_1=Label (self.master, text="label 1", bg='lavender')
                self.label_1Frame=LabelFrame(self.master, width=230, height=90, labelwidget= self.label_1, bg='lavender')
                self.label_1Frame.place(x=490, y=35)
                try:
                    self.label_2Frame.destroy()
                except AttributeError:
                    pass

            elif selection.get() ==2:
                self.label_2=Label (self.master, text="label_2", bg='lavender')
                self.label_2Frame=LabelFrame(self.master, width=230, height=60, labelwidget= self.label_2, bg='lavender')
                self.label_2Frame.place(x=490, y=340)
                try:
                    self.label_1Frame.destroy()
                except AttributeError:
                    pass

#root.mainloop()
if __name__=='__main__':
    main()

试试这个。