<form class="layui-form" action="" id="cameraStaForm">

<input type="checkbox" name="cameraSta"  id="cameraSta" lay-skin="switch" lay-filter="cameraSta" lay-text="ON|OFF" checked>

</form>

//设置选中

layui.use('form', function(){

    var form = layui.form;

 $('#cameraSta').prop("checked",true);

  form.render();

});

//设置取消选中

layui.use('form', function(){

    var form = layui.form;

 $('#cameraSta').prop("checked",false);

  form.render();

});