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!
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