region-picker.vue
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<template>
<view class="w-picker-view">
<picker-view class="d-picker-view" :indicator-style="itemHeight" :value="pickVal" @change="handlerChange">
<picker-view-column>
<view class="w-picker-item" v-for="(item,index) in range.provinces" :key="index">{{item.label}}</view>
</picker-view-column>
<picker-view-column>
<view class="w-picker-item" v-for="(item,index) in range.citys" :key="index">{{item.label}}</view>
</picker-view-column>
<picker-view-column v-if="!hideArea">
<view class="w-picker-item" v-for="(item,index) in range.areas" :key="index">{{item.label}}</view>
</picker-view-column>
</picker-view>
</view>
</template>
<script>
import areaData from "./areadata/areadata.js"
export default {
data() {
return {
pickVal:[],
range:{
provinces:[],
citys:[],
areas:[]
},
checkObj:{}
};
},
props:{
itemHeight:{
type:String,
default:"44px"
},
value:{
type:[Array,String],
default:""
},
defaultType:{
type:String,
default:"label"
},
hideArea:{
type:Boolean,
default:false
}
},
watch:{
value(val){
this.initData();
}
},
created() {
this.initData();
},
methods:{
getData(){
//用来处理初始化数据
let provinces=areaData;
let dVal=[];
let value=this.value;
let a1=value[0];//默认值省
let a2=value[1];//默认值市
let a3=value[2];//默认值区、县
let province,city,area;
let provinceIndex=provinces.findIndex((v)=>{
return v[this.defaultType]==a1
});
provinceIndex=value?(provinceIndex!=-1?provinceIndex:0):0;
let citys=provinces[provinceIndex].children;
let cityIndex=citys.findIndex((v)=>{
return v[this.defaultType]==a2
});
cityIndex=value?(cityIndex!=-1?cityIndex:0):0;
let areas=citys[cityIndex].children;
let areaIndex=areas.findIndex((v)=>{
return v[this.defaultType]==a3;
});
areaIndex=value?(areaIndex!=-1?areaIndex:0):0;
dVal=this.hideArea?[provinceIndex,cityIndex]:[provinceIndex,cityIndex,areaIndex];
province=provinces[provinceIndex];
city=citys[cityIndex];
area=areas[areaIndex];
let obj=this.hideArea?{
province,
city
}:{
province,
city,
area
}
return this.hideArea?{
provinces,
citys,
dVal,
obj
}:{
provinces,
citys,
areas,
dVal,
obj
}
},
initData(){
let dataData=this.getData();
let provinces=dataData.provinces;
let citys=dataData.citys;
let areas=this.hideArea?[]:dataData.areas;
let obj=dataData.obj;
let province=obj.province,city=obj.city,area=this.hideArea?{}:obj.area;
let value=this.hideArea?[province.value,city.value]:[province.value,city.value,area.value];
let result=this.hideArea?`${province.label+city.label}`:`${province.label+city.label+area.label}`;
this.range=this.hideArea?{
provinces,
citys,
}:{
provinces,
citys,
areas
};
this.checkObj=obj;
this.$nextTick(()=>{
this.pickVal=dataData.dVal;
});
this.$emit("change",{
result:result,
value:value,
obj:obj
})
},
handlerChange(e){
let arr=[...e.detail.value];
let provinceIndex=arr[0],cityIndex=arr[1],areaIndex=this.hideArea?0:arr[2];
let provinces=areaData;
let citys=(provinces[provinceIndex]&&provinces[provinceIndex].children)||provinces[provinces.length-1].children||[];
let areas=this.hideArea?[]:((citys[cityIndex]&&citys[cityIndex].children)||citys[citys.length-1].children||[]);
let province=provinces[provinceIndex]||provinces[provinces.length-1],
city=citys[cityIndex]||[citys.length-1],
area=this.hideArea?{}:(areas[areaIndex]||[areas.length-1]);
let obj=this.hideArea?{
province,
city
}:{
province,
city,
area
}
if(this.checkObj.province.label!=province.label){
//当省更新的时候需要刷新市、区县的数据;
this.range.citys=citys;
if(!this.hideArea){
this.range.areas=areas;
}
}
if(this.checkObj.city.label!=city.label){
//当市更新的时候需要刷新区县的数据;
if(!this.hideArea){
this.range.areas=areas;
}
}
this.checkObj=obj;
this.$nextTick(()=>{
this.pickVal=arr;
})
let result=this.hideArea?`${province.label+city.label}`:`${province.label+city.label+area.label}`;
let value=this.hideArea?[province.value,city.value]:[province.value,city.value,area.value];
this.$emit("change",{
result:result,
value:value,
obj:obj
})
}
}
}
</script>
<style lang="scss">
@import "./w-picker.css";
</style>