微信小程序如何实现地区选择伪五级联动
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效果图
这里采用的是自定义多列选择器picker mode="multiSelector"
<view class="section"> <view class="section__title">多列选择器</view> <picker mode="multiSelector" bindchange="bindMultiPickerChange" bindcolumnchange="bindMultiPickerColumnChange" value="{{multiIndex}}" range="{{multiArray}}"> <view wx:if="{{multiIndex[0]==0}}" class="picker" style='font-size:24rpx'> 当前选择:全国 </view> <view wx:elif="{{multiIndex[1]==0}}" class="picker" style='font-size:24rpx'> 当前选择:{{multiArray[0][multiIndex[0]]}} </view> <view wx:elif="{{multiIndex[2]==0}}" class="picker" style='font-size:24rpx'> 当前选择:{{multiArray[0][multiIndex[0]]}}-{{multiArray[1][multiIndex[1]]}} </view> <view wx:elif="{{multiIndex[3]==0}}" class="picker" style='font-size:24rpx'> 当前选择:{{multiArray[0][multiIndex[0]]}}-{{multiArray[1][multiIndex[1]]}}-{{multiArray[2][multiIndex[2]]}} </view> <view wx:else class="picker" style='font-size:24rpx'> 当前选择:{{multiArray[0][multiIndex[0]]}}-{{multiArray[1][multiIndex[1]]}}-{{multiArray[2][multiIndex[2]]}}-{{multiArray[3][multiIndex[3]]}} </view> </picker> </view>
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
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