最近整了一一些表单类的移动页面，遇到了一个省市区的联动选择，本来想着用公用库里面的以前pc端的省市区选择组件，但是发现pc端的效果在手机端用效果太不理想，设计没给出具体的设计效果，只好自己整了select原生的省市区选择效果，样式使用手机自带的效果，感觉样式效果凑合还能用，数据还是用的pc的数据，只是把组件的给重写了一下，代码效果如下：
wrap:'',itemName: ['省','市','区/县'],items: ['province','city','area'],callback: function(field,index) {} // 点击切换得时候才会执行
};
function Area(options){
options = $.extend({},DEFAULTS,options);
var that = this;
that.wrapper = $(options.wrap);
that.selectArr = that.wrapper.data('default')?that.wrapper.data('default').split(','):[110000,110100,110101]; //
that.items = options.items;
that.itemName = options.itemName;
that.callback = options.callback;
that.setValue();
that.events();
that.default = that.wrapper.data('default'); //默认输出省市区的id
that.validinput = $("#default-area");
var validval = that.default!==undefined?that.default:'';
that.validinput.val(validval);
}
Area.prototype = {
constructor: Area,//创建select，输出相应的数据
createItems:function(itemname,data,selectId){
var that = this;
//如果默认的defalut值没输出，则默认的给select添加相应的填写提示
var html = '<select name="'+itemname+'">'+(that.default === undefined ?'<option value="'+itemname+'" selected ="selected">'+that.itemName[that.index]+' ' : '');
for (var k in data) {
html += '<option value ="'+ data[k].id +'"'+(selectId === data[k].id ? 'selected = "selected"' : '')+'>' + data[k].name + '</option>';
}
html += '</select>';
return html;},//设置初始值
setValue:function(){
var that = this,html = '';
$.each(that.selectArr,function(index,k){
that.index = index;
html += that.createItems(that.items[index],that.getData(that.items[index],that.selectArr[index-1]),k);
})
that.wrapper.append(html)},//获取数据
getData: function(type,pid) {
if (type === 'province') {
return data.provinces || []; // 省份信息不需要pid
}
if (type === 'city') {
return data.cities[pid] || [];
}
if (type === 'area') {
return data.areas[pid] || [];
}},//获取select索引值
getItemIndex:function(type){
var that = this;
for(var i= 0,l = that.items.length;i<l;i++){
if(that.items[i] == type){
return i;
}
}
},//触发change时候，select下一位值重新初始化
setItemVal:function(select){
var that = this;
var $this = select,previd = $this.val(),$type =$this.attr('name'),$nxtType = '';
if($type!='area'){
$nxtType = that.items[that.getItemIndex($type)+1];
var data = that.getData($nxtType,previd),html = that.createItems($nxtType,nextSelect = $('select[name="'+$nxtType+'"]');
if($this.siblings('select[name="'+$nxtType+'"]').length>0){
nextSelect.remove();
}
$this.after(html);
nextSelect.find('option:first').prop('selected',true);
$('select[name="'+$nxtType+'"]').trigger('change');
} else{
that.validinput.val($this.val()).trigger('validate')
}
that.index = that.getItemIndex($type);
//触发change后可以设置回调<a href="https://www.jb51.cc/tag/hanshu/" target="_blank" class="keywords">函数</a>
if (that.callback) {
that.callback.call(this,select,that.getItemIndex($type));
}},events:function(){
var that = this;
//select change事件
$doc.on('change','.area-container select',function(){
that.setItemVal($(this));
})}
}
module.exports = Area;
