<a href="javascript:;" rel="external nofollow" onclick="datadel()" class="btn btn-danger radius">
<i class="Hui-iconfont" >&#xe6e2;</i> 批量删除</a>
<td><input type="checkbox" value="{$category.id}" name="id"></td>

function datadel(obj){
  layer.confirm('确认要批量删除吗？',function(index){
    var id=new Array();
    $('input[name="id"]:checked').each(function(){
      id.push($(this).val());//向数组中添加元素
    });
   $.post(
      "{:url('admin/article_category/delAllCategory')}",
      {id:id},
      function(dat){
        if(dat){
          $(obj).parents("tr").remove();
          layer.msg('已删除!',{icon:1,time:1000});
          document.location.reload();//当前页面
        }else{
          var msg = dat.msg;
          layer.msg(msg,{icon:2,time:2000});
        }
      });
  });
}

public function delAllCategory(){
    $id=input("id/a");
    //方法一
    $id = implode(",",$id) ;
    $data=Db::name("article_categorys")->where("id in ($id)")->delete();
    //方法二
     $data=Db::name("operation")->delete($id);
    exit(json_encode($data));
  }
// 根据主键删除
Db::table('think_user')->delete(1);
Db::table('think_user')->delete([1,2,3]);
// 条件删除
Db::table('think_user')->where('id',1)->delete();
Db::table('think_user')->where('id','<',10)->delete();