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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 v-for="(group,gIndex) in range" :key="gIndex">
<view class="w-picker-item" v-for="(item,index) in group" :key="index">{{item[nodeKey]}}</view>
</picker-view-column>
</picker-view>
</view>
</template>
<script>
export default {
data() {
return {
pickVal:[],
range:[],
checkObj:{}
};
},
props:{
itemHeight:{
type:String,
default:"44px"
},
value:{
type:[Array,String],
default:""
},
defaultType:{
type:String,
default:"label"
},
options:{
type:Array,
default(){
return []
}
},
defaultProps:{
type:Object,
default(){
return{
lable:"label",
value:"value",
children:"children"
}
}
},
level:{
//多级联动层级,表示几级联动
type:[Number,String],
default:2
}
},
computed:{
nodeKey(){
return this.defaultProps.label;
},
nodeVal(){
return this.defaultProps.value;
},
nodeChild(){
return this.defaultProps.children;
}
},
watch:{
value(val){
if(this.options.length!=0){
this.initData();
}
},
options(val){
this.initData();
}
},
created() {
if(this.options.length!=0){
this.initData();
}
},
methods:{
getData(){
//用来处理初始化数据
let options=this.options;
let col1={},col2={},col3={},col4={};
let arr1=options,arr2=[],arr3=[],arr4=[];
let col1Index=0,col2Index=0,col3Index=0,col4Index=0;
let a1="",a2="",a3="",a4="";
let dVal=[],obj={};
let value=this.value;
let data=[];
a1=value[0];
a2=value[1];
if(this.level>2){
a3=value[2];
}
if(this.level>3){
a4=value[3];
};
/*第1列*/
col1Index=arr1.findIndex((v)=>{
return v[this.defaultType]==a1
});
col1Index=value?(col1Index!=-1?col1Index:0):0;
col1=arr1[col1Index];
/*第2列*/
arr2=arr1[col1Index][this.nodeChild];
col2Index=arr2.findIndex((v)=>{
return v[this.defaultType]==a2
});
col2Index=value?(col2Index!=-1?col2Index:0):0;
col2=arr2[col2Index];
/*第3列*/
if(this.level>2){
arr3=arr2[col2Index][this.nodeChild];
col3Index=arr3.findIndex((v)=>{
return v[this.defaultType]==a3;
});
col3Index=value?(col3Index!=-1?col3Index:0):0;
col3=arr3[col3Index];
};
/*第4列*/
if(this.level>3){
arr4=arr3[col4Index][this.nodeChild];
col4Index=arr4.findIndex((v)=>{
return v[this.defaultType]==a4;
});
col4Index=value?(col4Index!=-1?col4Index:0):0;
col4=arr4[col4Index];
};
switch(this.level*1){
case 2:
dVal=[col1Index,col2Index];
obj={
col1,
col2
}
data=[arr1,arr2];
break;
case 3:
dVal=[col1Index,col2Index,col3Index];
obj={
col1,
col2,
col3
}
data=[arr1,arr2,arr3];
break;
case 4:
dVal=[col1Index,col2Index,col3Index,col4Index];
obj={
col1,
col2,
col3,
col4
}
data=[arr1,arr2,arr3,arr4];
break
}
return {
data,
dVal,
obj
}
},
initData(){
let dataData=this.getData();
let data=dataData.data;
let arr1=data[0];
let arr2=data[1];
let arr3=data[2]||[];
let arr4=data[3]||[];
let obj=dataData.obj;
let col1=obj.col1,col2=obj.col2,col3=obj.col3||{},col4=obj.col4||{};
let result="",value=[];
let range=[];
switch(this.level){
case 2:
value=[col1[this.nodeVal],col2[this.nodeVal]];
result=`${col1[this.nodeKey]+col2[this.nodeKey]}`;
range=[arr1,arr2];
break;
case 3:
value=[col1[this.nodeVal],col2[this.nodeVal],col3[this.nodeVal]];
result=`${col1[this.nodeKey]+col2[this.nodeKey]+col3[this.nodeKey]}`;
range=[arr1,arr2,arr3];
break;
case 4:
value=[col1[this.nodeVal],col2[this.nodeVal],col3[this.nodeVal],col4[this.nodeVal]];
result=`${col1[this.nodeKey]+col2[this.nodeKey]+col3[this.nodeKey]+col4[this.nodeKey]}`;
range=[arr1,arr2,arr3,arr4];
break;
}
this.range=range;
this.checkObj=obj;
this.$nextTick(()=>{
this.pickVal=dataData.dVal;
});
this.$emit("change",{
result:result,
value:value,
obj:obj
})
},
handlerChange(e){
let arr=[...e.detail.value];
let col1Index=arr[0],col2Index=arr[1],col3Index=arr[2]||0,col4Index=arr[3]||0;
let arr1=[],arr2=[],arr3=[],arr4=[];
let col1,col2,col3,col4,obj={};
let result="",value=[];
arr1=this.options;
arr2=(arr1[col1Index]&&arr1[col1Index][this.nodeChild])||arr1[arr1.length-1][this.nodeChild]||[];
col1=arr1[col1Index]||arr1[arr1.length-1]||{};
col2=arr2[col2Index]||arr2[arr2.length-1]||{};
if(this.level>2){
arr3=(arr2[col2Index]&&arr2[col2Index][this.nodeChild])||arr2[arr2.length-1][this.nodeChild];
col3=arr3[col3Index]||arr3[arr3.length-1]||{};
}
if(this.level>3){
arr4=(arr3[col3Index]&&arr3[col3Index][this.nodeChild])||arr3[arr3.length-1][this.nodeChild]||[];
col4=arr4[col4Index]||arr4[arr4.length-1]||{};
}
switch(this.level){
case 2:
obj={
col1,
col2
}
this.range=[arr1,arr2];
result=`${(col1[this.nodeKey]||'')+(col2[this.nodeKey]||'')}`;
value=[col1[this.nodeVal]||'',col2[this.nodeVal]||''];
break;
case 3:
obj={
col1,
col2,
col3
}
this.range=[arr1,arr2,arr3];
result=`${(col1[this.nodeKey]||'')+(col2[this.nodeKey]||'')+(col3[this.nodeKey]||'')}`;
value=[col1[this.nodeVal]||'',col2[this.nodeVal]||'',col3[this.nodeVal]||''];
break;
case 4:
obj={
col1,
col2,
col3,
col4
}
this.range=[arr1,arr2,arr3,arr4];
result=`${(col1[this.nodeKey]||'')+(col2[this.nodeKey]||'')+(col3[this.nodeKey]||'')+(col4[this.nodeKey]||'')}`;
value=[col1[this.nodeVal]||'',col2[this.nodeVal]||'',col3[this.nodeVal]||'',col4[this.nodeVal]||''];
break;
}
this.checkObj=obj;
this.pickVal=arr;
this.$emit("change",{
result:result,
value:value,
obj:obj
})
}
}
}
</script>
<style lang="scss">
@import "./w-picker.css";
</style>