layui radio性别单选框赋值方法

<div class="layui-inline">
          <label class="layui-form-label">性别</label>
          <div class="layui-input-block">
            <input type="radio" name="sex" id="sex" value="1" title="男" >
            <input type="radio" name="sex" id="sex" value="2" title="女">           
          </div>
        </div>

 layui.use('form', function () {
      var $ = layui.jquery, form = layui.form;
      $.ajax({
        type: "post",
        url: "/shared/getpidate",
        data: {},
        async: true,
        datatype: "json",
        success: function (data) {
          $("input[name=sex][value=1]").attr("checked", data.usersex == 1 ? true : false);
          $("input[name=sex][value=2]").attr("checked", data.usersex == 2 ? true : false);
          form.render(); //更新全部         
        }
       }
     });