需求:
对地区进行选择,选择相应的省,就会出现相应范围的市,然后出现相应的范围的县区;如果县不存在,就不现实,自我要求是自己写个简单的插件,方便以后调用;
逻辑:
1.通过div的类名来获取,其下的select标签;
2.通过声明临时变量,用来保存option内容,并通过$.each()来遍历json然后添加到select中;
3.如果某个市没有县,就先判断json中有没记录,如果没有就不现实,有就继续执行下面代码;
4.用change事件来控制三个selet之间的联系;
5.通过ajax $.getJSON,来触发省份事件,然后通过省份select的改变,来触发市区,以此类推;
实现:
json数据
[
{"p":"江西省",
"c":[
{"ct":"南昌市",
"d":[
{"dt":"西湖区"},
{"dt":"东湖区"},
{"dt":"高新区"}
]},
{"ct":"赣州市",
"d":[
{"dt":"瑞金县"},
{"dt":"南丰县"},
{"dt":"全南县"}
]}
]},
{"p":"北京",
"c":[
{"ct":"东城区"},
{"ct":"西城区"}
]},
{"p":"河北省",
"c":[
{"ct":"石家庄",
"d":[
{"dt":"长安区"},
{"dt":"桥东区"},
{"dt":"桥西区"}
]},
{"ct":"唐山市",
"d":[
{"dt":"滦南县"},
{"dt":"乐亭县"},
{"dt":"迁西县"}
]}
]}
]
html代码
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>select</title>
<meta name="description" content="">
<meta name="keywords" content="">
<script type="text/javascript" src="jquery.js"></script>
<script src = "areaSelect.js"></script>
<link href="" rel="stylesheet">
<style>
.sel{
width:300px;
margin:0 auto;
}
</style>
</head>
<body>
<div class="sel">
<select class="province">
<option>请选择</option>
</select>
<select class="city">
<option>请选择</option>
</select>
<select class="district">
<option>请选择</option>
</select>
</div>
</body>
</html>
<script>
$(document).ready(function(){
$(".sel").areaSelect({
"jsonUrl":"area.json"
})
})
</script>
jquery插件
/**
*
* @authors Your Name (you@example.org)
* @date 2015-09-13 01:54:25
* @version $Id$
*/
(function($){
$.fn.areaSelect = function(options){
var settings = $.extend({
"jsonUrl":"json"
},options); return this.each(function(){
var url = options.jsonUrl;
var addJson;
var tHtml = "";
var op = $(this).find(".province");
var oc = $(this).find(".city");
var od = $(this).find(".district");
//初始化
var province = function(){
$.each(addJson,function(i,province){
tHtml += "<option value = '"+province.p+"'>"+province.p+"</option>";
});
op.html(tHtml);
city(); }
var city = function(){
var tHtml="";
var n = op.get(0).selectedIndex;
$.each(addJson[n].c,function(i,city){
tHtml += "<option value='"+city.ct+"''>"+city.ct+"</option>";
});
oc.html(tHtml);
district();
}
var district = function(){
var tHtml="";
var n = op.get(0).selectedIndex;
var m = oc.get(0).selectedIndex;
if(typeof (addJson[n].c[m].d) == "undefined"){
od.css("display","none")
}else{
od.css("display","inline");
$.each(addJson[n].c[m].d,function(i,district){
tHtml += "<option value='"+district.dt+"'>"+district.dt+"</option>"
});
od.html(tHtml);
} } op.change(function(){
city();
})
oc.change(function(){
district()
});
$.getJSON(settings.jsonUrl,function(data){
addJson = data;
province()
}) })
}
})(jQuery)
转载自:http://www.cnblogs.com/afuge/archive/2013/06/08/3127172.html 有修改!