微信开发 使用picker封装省市区三级联动模板

<"Content-type: text/html; charset=utf-8"); 
 
$type=$_REQUEST["type"];//获取省市区的标志 
$fcode=$_GET["fcode"]; 
 
$retArr=[ 
 "status"=>true, 
 "data"=>[], 
 "msg"=>"" 
]; 
 
if($type!="province" && $type!="city" && $type!="county"){ 
 $retArr["status"]=false; 
 $retArr["msg"]="获取地区类型错误，请检查"; 
  
 echo json_encode($retArr); 
 exit; 
} 
 
function getProvince(){ 
 $province=[]; 
 $code=["110000", "350000", "710000"]; 
 $province["code"]=$code; 
 $name=["北京市", "福建省", "台湾省"]; 
 $province["name"]=$name; 
 $fcode=["0", "0", "0"]; 
 $province["fcode"]=$fcode; 
 return $province; 
} 
function getCity($P_fcode){ 
 $city=[]; 
 $code=[]; 
 $name=[]; 
 $fcode=[]; 
 if($P_fcode=="110000"){ 
  $code=["110100"]; 
  $name=["北京市"]; 
  $fcode=$P_fcode; 
 } 
 if($P_fcode=="350000"){ 
  $code=["350100", "350200", "350300", "350400", "350500", "350600", "350700", "350800", "350900"]; 
  $name=["福州市", "厦门市", "莆田市", "三明市", "泉州市", "漳州市", "南平市", "龙岩市", "宁德市"]; 
  $fcode=$P_fcode; 
 } 
 if($P_fcode=="710000"){ 
   
 } 
 $city=["code"=>$code, "name"=>$name, "fcode"=>$fcode]; 
 return $city; 
} 
function getCounty($P_fcode){ 
 $county=[]; 
 $code=[]; 
 $name=[]; 
 $fcode=[]; 
 if($P_fcode=="110100"){ 
  $code=["110101", "110102", "110103", "110104", "110105", "110106", "110107"]; 
  $name=["东城区", "西城区", "崇文区", "宣武区", "朝阳区", "丰台区", "石景山区"]; 
  $fcode=$P_fcode; 
 } 
 if($P_fcode=="350100"){ 
  $code=["350102", "350103", "350104"]; 
  $name=["鼓楼区", "台江区", "苍山区"]; 
  $fcode=$P_fcode; 
 } 
 if($P_fcode=="350200"){ 
  $code=["350203", "350205", "350206"]; 
  $name=["思明区", "海沧区", "湖里区"]; 
  $fcode=$P_fcode; 
 } 
 $county=["code"=>$code, "name"=>$name, "fcode"=>$fcode]; 
 return $county; 
} 
 
//var_dump($province); 
if($type=="province"){ 
 $province=getProvince(); 
 $retArr["data"]=$province; 
}else if($type=="city"){ 
 $city=getCity($fcode); 
 $retArr["data"]=$city; 
}else if($type="county"){ 
 $county=getCounty($fcode); 
 $retArr["data"]=$county; 
} 
 
echo json_encode($retArr); 
 
 
"htmlcode">

<template name="city"> 
<view class="areas"> 
 <view class="province"> 
 <picker bindchange="provincePickerChange" value="{{provinceIndex}}" range="{{province.name}}" data-city-url="{{cityUrl}}"> 
 <text class="select-item">{{province.name[provinceIndex]}}</text> 
 </picker> 
 </view> 
 
 <view class="city"> 
 <block wx:if="{{!city.name.length}}"> --二级市区-- </block> 
 <block wx:if="{{city.name.length>0}}"> 
 <picker bindchange="cityPickerChange" value="{{cityIndex}}" range="{{city.name}}" data-county-url="{{countyUrl}}"> 
  <text class="select-item">{{city.name[cityIndex]}}</text> 
 </picker> 
 </block> 
 </view> 
 
 <view class="county"> 
 <block wx:if="{{!county.name.length}}"> --三级地区-- </block> 
 <block wx:if="{{county.name.length>0}}"> 
 <picker bindchange="countyPickerChange" value="{{countyIndex}}" range="{{county.name}}"> 
  <text class="select-item">{{county.name[countyIndex]}}</text> 
 </picker> 
 </block> 
 </view> 
 
</view> 
</template> 


cityTemplate.js：：




/** 
 * 获取三级联动的三个函数 
 * that: 注册页面的this实例 必填 
 * p_url: 一级省份url 必填 
 * p_data：一级省份参数 选填 
 */ 
var net = require( "net" );//引入request方法 
var g_url, g_datd, g_cbSuccess, g_cbSuccessErr, g_cbFail, g_cbComplete, g_header, g_method; 
 
function initCityFun( that, p_url, p_data ) { 
 //获取一级省份数据 
 g_cbSuccess = function( res ) { 
  that.setData( { 
  'city.province': res 
  }); 
 }; 
 net.r( p_url, p_data, g_cbSuccess, g_cbSuccessErr, g_cbFail, g_cbComplete, g_header, g_method ); 
 
 //点击一级picker触发事件并获取市区方法 
 var changeProvince = function( e ) { 
  that.setData( { 
   'city.provinceIndex': e.detail.value 
  }); 
  var _fcode = that.data.city.province.code[ e.detail.value ]; 
  if( !_fcode ) { 
   _fcode = 0; 
  } 
  var _cityUrl = e.target.dataset.cityUrl; 
 
  g_url = _cityUrl + _fcode; 
  g_cbSuccess = function( res ) { 
   that.setData( { 
    'city.city': res 
   }); 
  } 
  net.r( g_url, g_datd, g_cbSuccess, g_cbSuccessErr, g_cbFail, g_cbComplete, g_header, g_method ); 
 }; 
 that[ "provincePickerChange" ] = changeProvince; 
 
 //点击二级picker触发事件并获取地区方法 
 var changeCity = function( e ) { 
  that.setData( { 
   'city.cityIndex': e.detail.value 
  }); 
  var _fcode = that.data.city.city.code[ e.detail.value ]; 
  if( !_fcode ) { 
   _fcode = 0; 
  } 
  var _countyUrl = e.target.dataset.countyUrl; 
  g_url = _countyUrl + _fcode; 
 
  g_cbSuccess = function( res ) { 
   that.setData( { 
    'city.county': res 
   }); 
  }; 
  net.r( g_url, g_datd, g_cbSuccess, g_cbSuccessErr, g_cbFail, g_cbComplete, g_header, g_method ); 
 }; 
 that[ "cityPickerChange" ] = changeCity; 
 
 //点击三级picker触发事件 
 var changeCounty = function( e ) { 
  that.setData( { 
   'city.countyIndex': e.detail.value 
  }); 
 }; 
 that["countyPickerChange"]=changeCounty; 
} 
 
function getProvinceFun(that, p_url, p_data){ 
 g_cbSuccess = function( res ) { 
  that.setData( { 
  'city.province': res 
  }); 
 }; 
 net.r( p_url, p_data, g_cbSuccess, g_cbSuccessErr, g_cbFail, g_cbComplete, g_header, g_method ); 
} 
 
module.exports={ 
 initCityFun: initCityFun, 
 getProvinceFun: getProvinceFun 
} 


顺道net.js方法：：




/** 
 * 网络发送http请求,默认为返回类型为json 
 * 
 * url: 必须,其他参数非必须 接口地址 
 * data:请求的参数 Object或String 
 * successFun(dts):成功返回的回调函数，已自动过滤微信端添加数据,按接口约定,返回成功后的data数据,过滤掉msg和status 
 * successErrorFun(msg):成功执行请求,但是服务端认为业务错误,执行其他行为,默认弹出系统提示信息. 
 * failFun:接口调用失败的回调函数 
 * completeFun:接口调用结束的回调函数（调用成功、失败都会执行） 
 * header:object,设置请求的 header , header 中不能设置 Referer 
 * method:默认为 GET，有效值：OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT 
 * 
 */ 
function r( url, data, successFun, successErrorFun, failFun, completeFun, header, method ) { 
 var reqObj = {}; 
 reqObj.url = url; 
 reqObj.data = data; 
 
 //默认头为json 
 reqObj.header = { 'Content-Type': 'application/json' }; 
 if( header ) { 
  //覆盖header 
  reqObj.header = header; 
 } 
 
 
 if( method ) { 
  reqObj.method = method; 
 } 
 reqObj.success = function( res ) { 
  var returnData = res.data; //将微信端结果过滤,获取服务端返回的原样数据 
  var status = returnData.status; //按接口约定,返回status时,才调用成功函数 
  //console.log(res); 
  //正常执行的业务函数 
  if( status == true ) { 
   if( successFun ) { 
    var dts = returnData.data; 
    successFun( dts );//回调，相当于获取到data后直接在回调里面处理赋值数据 
   } 
  } else if( status == false ) { 
   var msg = returnData.msg; 
   if( !successErrorFun ) { 
    console.log( msg ); 
   } else { 
    successErrorFun( msg ); 
   } 
 
  } else { 
   console.log( "服务端没有按照接口约定格式返回数据" ); 
  } 
 
 
 } 
 reqObj.fail = function( res ) { 
  if( failFun ) { 
   failFun( res ); 
  } 
 } 
 reqObj.complete = function( res ) { 
  if( completeFun ) { 
   completeFun( res ); 
  } 
 } 
 
 
 wx.request( reqObj ); 
} 
 
module.exports = { 
 r: r 
} 


核心代码就是上面这三个文件，接下来是demo文件做测试：：

demo.wxml：：


<import src="/UploadFiles/2021-04-02/cityTemplate.wxml">

demo.js：：




var city = require( '../../common/cityTemplate' ); 
Page( { 
 data: { 
 
 }, 
 onLoad: function( options ) { 
 var _that = this; 
 //创建三级联动数据对象 ---- 这个city对象是固定的，只有请求的url是根据各自的服务端地址来更改的 
 _that.setData( { 
  city: { 
  province: {},//格式province:{code: ["11000", "12000"], name: ["北京市", "上海市"]},只能固定是name和code，因为模板需要根据这俩参数显示 
  city: {}, 
  county: {}, 
  provinceIndex: 0, 
  cityIndex: 0, 
  countyIndex: 0, 
  cityUrl: "http://localhost:8282/phpserver/areas.php",//type表示获取地区 fcode是一级code码，到时具体根据后端请求参数修改 
  countyUrl: "http://localhost:8282/phpserver/areas.php" 
  } 
 }) 
 var _url = "http://localhost:8282/phpserver/areas.php"; 
 var _data = { 'type': 'province', 'fcode': '0' }; 
 city.initCityFun( _that, _url, _data ); 
 } 
}) 


以上完整代码文件，最终测试如下：

这里存在一个bug，开启下拉刷新和picker组件的下拉会重叠了，不知道是开发工具原因，还是还为修改的bug。。。只能等微信方面更新消息给反馈了。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。