class TodoItem extends StatelessWidget {
  final Todo todo;
  const TodoItem({super.key, required this.todo});
  
  @override
  Widget build(BuildContext context) {
    return  ListTile(
      contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 5),
      selectedTileColor: Colors.red,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(15)
      ),
      tileColor: Colors.grey,
      leading: **IconButton(
          color: Colors.black,
          iconSize: 18,
          icon: Icon( 
            todo.isDone ? Icons.check_box : Icons.check_box_outline_blank
            ),
          onPressed: () {
              todo.isDone = !todo.isDone;
          },
        ),**
      title:  Text(
        "${todo.body}",
        style: const TextStyle(
          fontSize: 25,
          color: Colors.black,
          decoration: TextDecoration.lineThrough,
        ),
      ),
      subtitle: const Text(
        'date',
        style: TextStyle(
          color: Colors.black,
          fontSize: 15,
        ),
      ),
      trailing: Container(
        height: 30,
        width: 30,
        decoration: BoxDecoration(
          color: Colors.red,
          borderRadius: BorderRadius.circular(5),
        ),
        child: IconButton(
          color: Colors.white,
          iconSize: 18,
          icon: const Icon(Icons.delete),
          onPressed: () {},
        ),
      ),
    );
  }
}

字符串
这是一个类，但问题是：

leading: IconButton(
          color: Colors.black,
          iconSize: 18,
          icon: Icon( 
            todo.isDone ? Icons.check_box : Icons.check_box_outline_blank // here is just giving me the checkbox
            ),
          onPressed: () {
              todo.isDone = !todo.isDone;
          },
        ),

型
没有尝试其他任何东西.我知道另一种方法可以工作，但它只是一个图标