动态按钮类在数组变化后未更新

需要手动调用按钮类的更新函数来更新数组变化后的按钮。示例如下：

class DynamicButton extends StatelessWidget {
  final List<String> buttonTitles;

  const DynamicButton({required this.buttonTitles});

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        for (final title in buttonTitles) ...[
          ElevatedButton(
            onPressed: () {},
            child: Text(title),
          ),
          SizedBox(height: 16),
        ],
      ],
    );
  }

  /// 手动调用更新函数
  void updateButton(List<String> newTitles) {
    buttonTitles.clear();
    buttonTitles.addAll(newTitles);
  }
}

// 使用
class MyPage extends StatefulWidget {
  @override
  _MyPageState createState() => _MyPageState();
}

class _MyPageState extends State<MyPage> {
  List<String> _buttonTitles = ['button1', 'button2', 'button3'];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        children: [
          SizedBox(height: 100),
          DynamicButton(buttonTitles: _buttonTitles),
          ElevatedButton(
            onPressed: () {
              setState(() {
                _buttonTitles = ['newButton1', 'newButton2'];
              });
              // 手动调用更新函数
              (context.findAncestorStateOfType<_MyPageState>()?.context
                      as _MyPageState?)
                  ?.updateButton(_buttonTitles);
            },
            child: Text('Change Buttons'),
          ),
        ],
      ),
    );
  }
}