其实所谓回显，也只是默认值的问题。例如，一个省市联动，如果当一个用户修改自己信息的时候，那么他能看到级联选择的值，也就是说
在修改页面我们给级联选择器赋值一个默认值就可以了。截图是官方文档
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app.selectedoptions=json.parse(str);
下面是我的部分代码
html:
js：
selectedoptions:[],
$.ajax({
type:"get",
url:this.api.userdata+"?id="+result,
datetype:"json",
contenttype : 'application/json',
success:function(result){
app.user=result.data;
app.selectedoptions=json.parse(result.data.useraddress);
},
error:function(result){
}
});
运行结果：
ps：以后写代码还是要多思考，虽然有些功能能实现，但是要在功能实现过后想一想是否更简单的做法。
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