小编给大家分享一下小程序组件开发中省市区三级联动的示例分析,希望大家阅读完这篇文章之后都有所收获,下面让我们一起去探讨吧!
index.wxml
<import src="../../templates/address-temp"/> <template is="addressPicker" data="{{provinceIndex:city.provinceIndex,cityIndex:city.cityIndex,districtIndex:city.districtIndex,province:city.province, city:city.city[city.selectedProvince],district:city.district[city.selectedCity]}}"/>
index.js
var city = require("../../utils/city.js"); Page({ data: {}, onLoad: function() { console.log('onLoad...'); var that = this; city.init(that); } });
address-temp.wxml
<?xml version="1.0" encoding="utf-8"?> <template name="addressPicker"> <view style="display:flex;margin:0;height:100%;align-items: center;justify-content: center"> <view style="width:100%;"> <picker bindchange="bindProvinceChange" value="{{provinceIndex}}" range="{{province}}"> <view style="text-align:center;padding:10rpx;font-size:0.8rem">{{province[provinceIndex]}}</view> </picker> </view> <view style="width:100%;"> <picker bindchange="bindCityChange" value="{{cityIndex}}" range="{{city}}"> <view style="text-align:center;padding:10rpx;font-size:0.8rem">{{city[cityIndex]}}</view> </picker> </view> <view style="width:100%;"> <picker bindchange="bindDistrictChange" value="{{districtIndex}}" range="{{district}}"> <view style="text-align:center;padding:10rpx;font-size:0.8rem">{{district[districtIndex]}}</view> </picker> </view> </view> </template>
city.js
var city = { province: ['-请选择-', '福建省'], city: { '-请选择-': ['-请选择-'], '福建省': ['福州市', '厦门市', '泉州市'] }, district: { '-请选择-': ['-请选择-'], '福州市': ['鼓楼区', '台江区'], '厦门市': ['湖里区', '集美区'], '泉州市': ['晋江市', '安溪县'] }, provinceIndex: 0, cityIndex: 0, districtIndex: 0, selectedProvince: '-请选择-', selectedCity: '-请选择-', selectedDistrct: '-请选择-' }; function init(that) { that.setData({ 'city': city }); var bindProvinceChange = function(e) { var city = that.data.city; that.setData({ 'city.provinceIndex': e.detail.value, 'city.selectedProvince': city.province[e.detail.value], 'city.selectedCity': city.city[city.province[e.detail.value]][0], 'city.selectedDistrct': city.district[city.city[city.province[e.detail.value]][0]][0], 'city.cityIndex': 0, 'city.districtIndex': 0 }); }; var bindCityChange = function(e) { var city = that.data.city; that.setData({ 'city.cityIndex': e.detail.value, 'city.selectedCity': city.city[city.selectedProvince][e.detail.value], 'city.districtIndex': 0, 'city.selectedDistrct': city.district[city.city[city.selectedProvince][e.detail.value]][0] }); }; var bindDistrictChange = function(e) { var city = that.data.city; that.setData({ 'city.districtIndex': e.detail.value, 'city.selectedDistrct': city.district[city.selectedCity][e.detail.value] }); }; that['bindProvinceChange'] = bindProvinceChange; that['bindCityChange'] = bindCityChange; that['bindDistrictChange'] = bindDistrictChange; } module.exports = { init: init }
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