checkbox全选

<input type="checkbox" name="checkall" onclick="selectAll(this)">全选<br/>
<input type="checkbox" name="layer" value="1">1楼
<input type="checkbox" name="layer" value="2">2楼

        function selectAll(dom){
            if($(dom).is(':checked')){
                $('input[name="layer"]').each(function(){
                    $(this).prop("checked",true);
                });
            }else{
                $('input[name="layer"]').each(function(){
                    $(this).prop("checked",false);
                });
            }

        }

layui

<div class="layui-input-block">
     <input type="checkbox" name="checkall" lay-filter="selectAll" onclick="selectAll(this)" title="全选" lay-skin="primary"><br/>
     <input type="checkbox" name="layer" value="1" title="1层" lay-skin="primary" lay-filter="c_one">
     <input type="checkbox" name="layer" value="2" title="2层" lay-skin="primary" lay-filter="c_one">
     <input type="checkbox" name="layer" value="3" title="3层" lay-skin="primary" lay-filter="c_one">
     <input type="checkbox" name="layer" value="4" title="4层" lay-skin="primary" lay-filter="c_one">
     <input type="checkbox" name="layer" value="5" title="5层" lay-skin="primary" lay-filter="c_one">
     <input type="checkbox" name="layer" value="6" title="6层" lay-skin="primary" lay-filter="c_one">
</div>

 //有一个未选中全选取消选中
        form.on('checkbox(c_one)', function (data) {
            var item =$(':checkbox[name ="layer"]');
            for (var i = 0; i < item.length; i++) {
                if (item[i].checked == false) {
                    $(':checkbox[name ="checkall"]').prop("checked", false);
                    form.render('checkbox');
                    break;
                }
            }
            //如果都勾选了  勾上全选
            var  all=item.length;
            for (var i = 0; i < item.length; i++) {
                if (item[i].checked == true) {
                    all--;
                }
            }
            if(all==0){
                $(':checkbox[name ="checkall"]').prop("checked", true);
                form.render('checkbox');}
        });

        //反选
        form.on('checkbox(selectAll)', function (data) {
            var item = $(':checkbox[name ="layer"]');
            item.each(function () {
                if ($(this).prop("checked")) {
                    $(this).prop("checked", false);
                } else {
                    $(this).prop("checked", true);
                }
            })
            form.render('checkbox');

        });

 

 layui.use('form', function () {
        var form = layui.form;
});