lw_test/app/admin/view/seat/seat_form.html

<div class="layui-fluid">
    <div class="layui-row layui-col-space15">
        <div class="layui-col-md12">
            <div class="layui-form layui-form-pane" lay-filter="{$lay_table}">
                <div class="layui-card">
                    <div class="layui-card-header">活动信息</div>
                    <div class="layui-card-body" pad15>
                        <input type="hidden" name="id" value="{:array_get($info,'id')}">
                        <div class="layui-form-item">
                            <label class="layui-form-label"><span style="color:#f90c05;">*</span>标题</label>
                            <div class="layui-input-block">
                                <input type="text" name="title" value="{:array_get($info,'title')}"
                                       lay-verify="required"
                                       placeholder="请输入标题" autocomplete="off"
                                       class="layui-input">
                            </div>
                        </div>
                        <div class="layui-form-item">
                            <label class="layui-form-label"><span style="color:#f90c05;">*</span>状态</label>
                            <div class="layui-input-block">
                                {volist name="status_list" id="v"}
                                    <input type="radio" name="status" value="{$key}" title="{$v}"
                                           {eq name=":array_get($info,'status',1)" value="$key" }checked{/eq}>
                                {/volist}
                            </div>
                        </div>
                        <div class="layui-form-item">
                            <label class="layui-form-label"><span style="color:#f90c05;">*</span>时间</label>
                            <div class="layui-input-block">
                                <input type="text" name="start_time" id="start_time"
                                       value="{:array_get($info,'start_time')}" lay-verify="required"
                                       placeholder="请选择..." autocomplete="off" class="layui-input">
                            </div>
                        </div>
                    </div>
                    <div class="layui-card-header">座位设置</div>
                    <div class="layui-card-body" pad15>
                        <div>
                            <button class="layui-btn layuiadmin-btn" id="add-table" type="button">添加</button>
                        </div>
                        <form id="form">
                            <table class="layui-table">
                                <colgroup>
                                    <col width="400">
                                    <col width="100">
                                    <col width="100">
                                </colgroup>
                                <thead>
                                <tr>
                                    <th>排数</th>
                                    <th>人数</th>
                                    <th>操作</th>
                                </tr>
                                </thead>
                                <tbody id="tb">

                                </tbody>
                            </table>
                        </form>
                    </div>
                </div>

                <div class="layui-form-item">
                    <div class="layui-input-block">
                        <input type="button" lay-submit lay-filter="{$lay_btn}" value="确认提交" class="layui-btn">
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<script>
    layui.use(['index', 'form', 'layedit', 'upload', 'laydate'], function () {
        const $ = layui.$;
        const admin = layui.admin;
        const laydate = layui.laydate;
        const form = layui.form;
        form.render();

        laydate.render({
            elem: '#start_time',
            type: 'datetime'
        });

        form.on('submit({$lay_btn})', function (obj) {
            const index = parent.layer.getFrameIndex(window.name);
            admin.req({
                url: "{:url('seat/editSeat')}",
                type: 'post',
                data: obj.field,
                done: function (res) {
                    layer.msg("提交成功", {
                        icon: 1
                    });
                    parent.layui.table.reload('lay-seat-index-table'); //重载表格
                    parent.layer.close(index);
                }
            });
        });

        let data = {$seat_list};

        function createTable() {
            let html = "";
            data.forEach((v, k) => {
                html += `<tr>
                        <td>第${k + 1}排</td>
                        <td>
                            <input placeholder="人数"
                                   name="seat_list[]"
                                   lay-verify="required"
                                   value="${v}"
                                   type="number"
                                   class="layui-input"/>
                        </td>
                        <td>
                            <button class="layui-btn layui-btn-danger layuiadmin-btn delete-table" type="button" data-index="${k}">删除</button>
                        </td>
                </tr>`;
            });

            $('#tb').html(html);
        }

        createTable();

        $('#add-table').click(function () {
            data = getFormData();
            data.push("");
            createTable();
        });

        $("#tb").on('click', '.delete-table', function () {
            let index = $(this).data('index');
            if (data.length <= 1) {
                return false;
            }

            data = getFormData();
            data.splice(index, 1);
            createTable();
        });

        function getFormData() {
            let arr = $('#form').serializeArray();
            if (arr.length === 0) {
                return arr;
            }

            let res = [];
            arr.map((v, k) => {
                res.push(v.value);
            })

            return res;
        }
    });
</script>