<div>
 <mt-picker :slots="myAddressSlots" @change="onMyAddressChange"></mt-picker>
 <p>地址3級聯(lián)動：{{myAddressProvince}} {{myAddressCity}} {{myAddresscounty}}</p>
</div>

<script>
 import { Picker } from 'mint-ui';
 import myaddress from '../../../static/address3.json' //引入省市區(qū)數(shù)據(jù)
 export default {
 name: '',
 components: {
 'mt-picker': Picker
 },
 props: {},
 data () {
 return {
 myAddressSlots: [
 {
 flex: 1,
 defaultIndex: 1, 
 values: Object.keys(myaddress), //省份數(shù)組
 className: 'slot1',
 textAlign: 'center'
 }, {
 divider: true,
 content: '-',
 className: 'slot2'
 }, {
 flex: 1,
 values: [],
 className: 'slot3',
 textAlign: 'center'
 },
 {
 divider: true,
 content: '-',
 className: 'slot4'
 },
 {
 flex: 1,
 values: [],
 className: 'slot5',
 textAlign: 'center'
 }
 ],
 myAddressProvince:'省',
 myAddressCity:'市',
 myAddresscounty:'區(qū)/縣',
 }
 },
 created() {


 },
 methods: {
 onMyAddressChange(picker, values) {
 if(myaddress[values[0]]){ //這個判斷類似于v-if的效果（可以不加，但是vue會報錯，很不爽）
 picker.setSlotValues(1,Object.keys(myaddress[values[0]])); // Object.keys()會返回一個數(shù)組，當前省的數(shù)組
 picker.setSlotValues(2,myaddress[values[0]][values[1]]); // 區(qū)/縣數(shù)據(jù)就是一個數(shù)組
 this.myAddressProvince = values[0];
 this.myAddressCity = values[1];
 this.myAddresscounty = values[2];
 }
 },
 },
 mounted(){
 this.$nextTick(() => { //vue里面全部加載好了再執(zhí)行的函數(shù) （類似于setTimeout）
 this.myAddressSlots[0].defaultIndex = 0 
 // 這里的值需要和 data里面 defaultIndex 的值不一樣才能夠初始化
 //因為我沒有看過源碼（我猜測是因為數(shù)據(jù)沒有改變，不會觸發(fā)更新）
 });
 }
 }
</script>