如何在wxPython的sizer中任意添加元素？wxGridBagSizer添加失败求助

动态修改wxSizer内的子控件后，必须手动触发布局刷新逻辑，你当前的代码只完成了控件的添加操作，没有通知sizer和父容器重新计算布局、重绘界面，因此新添加的元素不会正常显示。

• 优化控件清理逻辑：旧控件从sizer分离后直接销毁，避免残留控件占用内存
• 完成新控件批量添加后，依次调用网格布局和面板的布局刷新方法

import wx
import random


class MainFrame(wx.Frame):
    def __init__(self, *args, **kwargs):
        super().__init__(None, *args, **kwargs)

        self.panel = MainPanel(self)
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.panel)
        self.SetSizer(sizer)
        self.Center()
        self.Show()

    def on_reset_click(self, event):
        self.panel.numbers_fill(random.randint(1, 20))


class MainPanel(wx.Panel):
    def __init__(self, parent, *args, **kwargs):
        super().__init__(parent, *args, **kwargs)

        cmd_reset = wx.Button(self, id=wx.ID_OK, label="重置")
        cmd_reset.Bind(wx.EVT_BUTTON, parent.on_reset_click)

        self.number_sizer = wx.GridBagSizer(5, 5)
        self.numbers_fill(random.randint(1, 20))

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(cmd_reset, flag=wx.ALL, border=10)
        sizer.Add(self.number_sizer, flag=wx.ALL, border=10)
        self.SetSizer(sizer)

    def numbers_fill(self, max_integer):
        self.clear_sizer(self.number_sizer)
        for index, _ in enumerate(range(max_integer)):
            row = int(index / 5)
            column = index % 5
            lbl_number = wx.StaticText(self, label=str(_))
            self.number_sizer.Add(lbl_number, pos=(row, column))
        # 新增布局刷新逻辑
        self.number_sizer.Layout()
        self.Layout()

    @staticmethod
    def clear_sizer(sizer):
        for child in sizer.GetChildren():
            sizer_child = child.GetWindow()
            # 直接销毁旧控件，避免内存残留
            if sizer_child:
                sizer_child.Destroy()
            sizer.Detach(sizer_child)

if __name__ == '__main__':
        wx_app = wx.App()
        MainFrame(size=(400,300))
        wx_app.MainLoop()

内容的提问来源于stack exchange，提问作者Psionman