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本文实例讲述了Yii2使用dropdownlist实现地区三级联动功能的方法。分享给大家供大家参考，具体如下：
视图部分：
['index'],'method' => 'get','options' => ['class' => 'form-inline']
]); ?>
field($model,'cityName',['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($cities,'id','name'),['prompt' => '请选择城市'])->label('请选择城市',['class' => 'sr-only']) ?>
field($model,'areaName',['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($areas,['prompt' => '请选择区县'])->label('请选择区县','communityName',['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($communities,['prompt' => '请选择小区'])->label('请选择小区',['class' => 'sr-only']) ?>
'btn btn-primary']) ?>
registerJs('
//市地址改变
$("#itemsearch-cityname").change(function() {
//市id值
var cityid = $(this).val();
$("#itemsearch-areaname").html(" |
