微信小程序实现地区选择伪五级联动代码示例

本篇文章小编给大家分享一下微信小程序实现地区选择伪五级联动代码示例，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。

效果图

这里采用的是自定义多列选择器picker mode="multiSelector"

    多列选择器
    
      
        当前选择：全国
      
      
        当前选择：{{multiArray[0][multiIndex[0]]}}
      
      
        当前选择：{{multiArray[0][multiIndex[0]]}}-{{multiArray[1][multiIndex[1]]}}
      
      
        当前选择：{{multiArray[0][multiIndex[0]]}}-{{multiArray[1][multiIndex[1]]}}-{{multiArray[2][multiIndex[2]]}}
      
      
        当前选择：{{multiArray[0][multiIndex[0]]}}-{{multiArray[1][multiIndex[1]]}}-{{multiArray[2][multiIndex[2]]}}-{{multiArray[3][multiIndex[3]]}}
      
    

multiArray包含4个数组（省市县镇），multiIndex是4个数组对应选中下标 

onLoad: async function (options) {
    let chinaData = await getCountryList()
    chinaData.unshift({city: [],code: 0,name: "全部"})
    for(let one of chinaData){
        one.city.unshift({county: [],code: 0,name: "全部"})
        for(let two of one.city){
            two.county.unshift({code: 0,name: "全部"})
        }
    }
    this.data.chinaData = chinaData;
    let sheng = []; //  设置省数组
    for(let i = 0; i < chinaData.length; i++) {
       sheng.push(chinaData[i].name);
    }
    this.setData({
       "multiArray[0]": sheng
    })
    this.getCity(); // 得到市
},
    bindMultiPickerChange: function(e) {
        console.log(e);
    },
    bindMultiPickerColumnChange: function(e) {
        let move = e.detail;
        let index = move.column;
        let value = move.value;
        if (index == 0) {
          this.setData({
            multiIndex: [value,0,0,0]
          })
          this.getCity();
        }
        if (index == 1) {
          this.setData({
            "multiIndex[1]": value,
            "multiIndex[2]": 0,
            "multiIndex[3]": 0
          })
          this.getXian();
        }
        if (index == 2) {
          this.setData({
            "multiIndex[2]": value,
            "multiIndex[3]": 0,
     
          })
          this.getZhen();
        }
        if (index == 3) {
          this.setData({
            "multiIndex[3]": value
          })
          this.getZhen();
        }
    },
    getCity: function() { //  得到市
        let shengNum = this.data.multiIndex[0];
        let chinaData = this.data.chinaData;
        let cityData = chinaData[shengNum].city;
        let city = [];
        for (let i = 0; i < cityData.length; i++) {
          city.push(cityData[i].name)
        }
        this.setData({
          "multiArray[1]": city
        })
        this.getXian();
    },
    getXian: function(e) { //  得到县
        let shengNum = this.data.multiIndex[0];
        let cityNum = this.data.multiIndex[1];
        let chinaData = this.data.chinaData;
        let xianData = chinaData[shengNum].city[cityNum].county;
        let xian = [];
        for (let i = 0; i < xianData.length; i++) {
          xian.push(xianData[i].name)
        }
        this.setData({
          "multiArray[2]": xian
        })
        this.getZhen();
    },
    async getZhen(){//  得到镇
        let shengNum = this.data.multiIndex[0];
        let cityNum = this.data.multiIndex[1];
        let xianNum = this.data.multiIndex[2];
        let chinaData = this.data.chinaData;
        let zhen = [];
        if(chinaData[shengNum].city[cityNum].county[xianNum].code == 0){
            this.setData({
                "multiArray[3]" : ["全部"]
            })
        }else{
            //这里需要传县的code值获取镇的数据
            let res =  await getTownByCounty(chinaData[shengNum].city[cityNum].county[xianNum].code)
            let zhenData = JSON.parse(res.data.data.json)
            zhenData.unshift({code: 0,name: "全部"})
            for (let i = 0; i < zhenData.length; i++) {
                zhen.push(zhenData[i].name)
            }
            this.setData({
                "multiArray[3]" : zhen
            })
        }
    }

省市县数据返回类型

镇返回数据