本demo的效果是单选框一有a和b两个选项按钮，单选框二有q和w两个选项按钮，
选中a，使得q不可选，w选中；选中b，使得w不可选，q选中
下面是完整的代码，需要引入layui.js，jquery.js，layui.css
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>layui</title>
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="layui/css/layui.css" media="all">
<!-- 注意：如果你直接复制所有代码到本地，上述css路径需要改成你本地的 -->
</head>
<body>
<form class="layui-form layui-form-pane" action="">
<div class="layui-form-item" pane="">
<label class="layui-form-label">单选框一</label>
<div class="layui-input-block" >
<input type="radio" name="sex" value="0" title="a" lay-filter='aaa'>
<input type="radio" name="sex" value="1" title="b" lay-filter='aaa'>
</div>
</div>
<div class="layui-form-item" pane="">
<label class="layui-form-label">单选框二</label>
<div class="layui-input-block">
<input type="radio" name="aa" value="0" title="q" lay-filter='bbb'>
<input type="radio" name="aa" value="1" title="w" lay-filter='bbb'>
</div>
</div>
<div class="layui-form-item">
<div class="layui-input-block">
<button class="layui-btn" lay-submit="" lay-filter="demo1">立即提交</button>
<button type="reset" class="layui-btn layui-btn-primary">重置</button>
</div>
</div>
</form>
<script src="layui/layui.js" charset="utf-8"></script>
<script src='layui/jquery-3.3.1.js'></script>
<!-- 注意：如果你直接复制所有代码到本地，上述js路径需要改成你本地的 -->
<script>
layui.use(['form'], function(){
var form = layui.form
form.on('radio(aaa)', function(data){
// console.log(data.elem); //得到radio原始DOM对象
// console.log(data.value); //被点击的radio的value值
if(data.value==0){
$('input[title=q]').removeAttr('checked').prop('disabled','disabled');
$('input[title=w]').removeAttr('disabled').prop('checked','checked');
form.render('radio')
}else{
$('input[title=q]').removeAttr('disabled').prop('checked','checked');
$('input[title=w]').removeAttr('checked').prop('disabled','disabled');
form.render('radio')
}
});
//监听提交
form.on('submit(demo1)', function(data){
layer.alert(JSON.stringify(data.field), {
title: '最终的提交信息'
})
return false;
});
});
from.on('radio')
</script>
</body>
</html>