如何实现构造showModalBottomSheet

要实现构造showModalBottomSheet，你可以在自定义的类中添加一个构造函数，构造函数的参数包含了showModalBottomSheet方法中的所有可选参数，然后在构造函数中调用showModalBottomSheet方法即可。

具体实现如下：

class MyBottomSheet {
  static void show(
    BuildContext context, {
    required WidgetBuilder builder,
    Color backgroundColor = Colors.white,
    double elevation = 0.0,
    ShapeBorder? shape,
    Clip? clipBehavior,
    bool isScrollControlled = false,
    bool useRootNavigator = false,
    bool isDismissible = true,
    bool enableDrag = true,
  }) {
    showModalBottomSheet(
      context: context,
      builder: builder,
      backgroundColor: backgroundColor,
      elevation: elevation,
      shape: shape,
      clipBehavior: clipBehavior,
      isScrollControlled: isScrollControlled,
      useRootNavigator: useRootNavigator,
      isDismissible: isDismissible,
      enableDrag: enableDrag,
    );
  }
}

这样就可以通过MyBottomSheet类的静态show方法来构造showModalBottomSheet了。调用方式如下：

MyBottomSheet.show(
  context,
  builder: (BuildContext context) => Container(
    child: Text('Hello World!'),
  ),
  backgroundColor: Colors.grey[200],
);