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微信開(kāi)發(fā) 使用picker封裝省市區(qū)三級(jí)聯(lián)動(dòng)模板

更新時(shí)間：2016年10月28日 11:54:20 作者：Kagami_Tiger

這篇文章主要學(xué)習(xí)微信開(kāi)發(fā)，如何使用picker封裝省市區(qū)三級(jí)聯(lián)動(dòng)模板,具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

目前學(xué)習(xí)小程序更多的是看看能否二次封裝其它組件，利于以后能快速開(kāi)發(fā)各種小程序應(yīng)用。目前發(fā)現(xiàn)picker的selector模式只有一級(jí)下拉，那么我們是否可以通過(guò)3個(gè)picker來(lái)實(shí)現(xiàn)三級(jí)聯(lián)動(dòng)模板的形式來(lái)引入其它頁(yè)面中呢？答案是肯定可以的。那么我的思路是這樣的：

1、使用template模板語(yǔ)法進(jìn)行封裝，數(shù)據(jù)從頁(yè)面?zhèn)魅?/p>

2、根據(jù)picker組件的語(yǔ)法，range只能是一組中文地區(qū)數(shù)組，但是我們需要每個(gè)地區(qū)的唯一碼來(lái)觸發(fā)下一級(jí)聯(lián)動(dòng)數(shù)據(jù)。這樣，我的做法是通過(guò)一個(gè)對(duì)象里面的兩組數(shù)據(jù)分表存儲(chǔ)中文名和唯一碼的兩個(gè)對(duì)象數(shù)組。格式【province:{code:['110000', '220000'...], name: ['北京市', '天津市'...]}】，這個(gè)格式是固定的，需要服務(wù)端配合返回

3、通過(guò)picker的bindchange事件來(lái)獲取下一級(jí)的數(shù)據(jù)，每個(gè)方法都寫(xiě)入函數(shù)中在暴露出來(lái)供頁(yè)面調(diào)用

然后講下我demo的目錄結(jié)構(gòu)：

common

-net.js//wx.request請(qǐng)求接口二次整合

-cityTemplate.js//三級(jí)聯(lián)動(dòng)方法

page

-demo

-demo.js

-demo.wxml

template

-cityTemplate.wxml

app.js

app.json

app.wxss

然后，使用phpstudy搭建了簡(jiǎn)單的服務(wù)端供測(cè)試。不要問(wèn)我服務(wù)端的為啥是這樣的，我也不懂，剛?cè)腴T(mén)我只要數(shù)據(jù)...

當(dāng)然你可以省掉這一步，將數(shù)據(jù)直接固定在demo.js里面進(jìn)行測(cè)試...

代碼如下：【服務(wù)端的返回?cái)?shù)據(jù)格式是遵循了下面的retArr的規(guī)范的】

<?php 
header("Content-type: text/html; charset=utf-8"); 
 
$type=$_REQUEST["type"];//獲取省市區(qū)的標(biāo)志 
$fcode=$_GET["fcode"]; 
 
$retArr=[ 
 "status"=>true, 
 "data"=>[], 
 "msg"=>"" 
]; 
 
if($type!="province" && $type!="city" && $type!="county"){ 
 $retArr["status"]=false; 
 $retArr["msg"]="獲取地區(qū)類型錯(cuò)誤，請(qǐng)檢查"; 
  
 echo json_encode($retArr); 
 exit; 
} 
 
function getProvince(){ 
 $province=[]; 
 $code=["110000", "350000", "710000"]; 
 $province["code"]=$code; 
 $name=["北京市", "福建省", "臺(tái)灣省"]; 
 $province["name"]=$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", "廈門(mén)市", "莆田市", "三明市", "泉州市", "漳州市", "南平市", "龍巖市", "寧德市"]; 
  $fcode=$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=["東城區(qū)", "西城區(qū)", "崇文區(qū)", "宣武區(qū)", "朝陽(yáng)區(qū)", "豐臺(tái)區(qū)", "石景山區(qū)"]; 
  $fcode=$P_fcode; 
 } 
 if($P_fcode=="350100"){ 
  $code=["350102", "350103", "350104"]; 
  $name=["鼓樓區(qū)", "臺(tái)江區(qū)", "蒼山區(qū)"]; 
  $fcode=$P_fcode; 
 } 
 if($P_fcode=="350200"){ 
  $code=["350203", "350205", "350206"]; 
  $name=["思明區(qū)", "海滄區(qū)", "湖里區(qū)"]; 
  $fcode=$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); 
 
 
?>

接下來(lái)是cityTemplate.wxml：：

<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}}"> --二級(jí)市區(qū)-- </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}}"> --三級(jí)地區(qū)-- </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：：

/** 
 * 獲取三級(jí)聯(lián)動(dòng)的三個(gè)函數(shù) 
 * that: 注冊(cè)頁(yè)面的this實(shí)例 必填 
 * p_url: 一級(jí)省份url 必填 
 * p_data：一級(jí)省份參數(shù) 選填 
 */ 
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 ) { 
 //獲取一級(jí)省份數(shù)據(jù) 
 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 ); 
 
 //點(diǎn)擊一級(jí)picker觸發(fā)事件并獲取市區(qū)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; 
 
 //點(diǎn)擊二級(jí)picker觸發(fā)事件并獲取地區(qū)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; 
 
 //點(diǎn)擊三級(jí)picker觸發(fā)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 
}

順道net.js方法：：

/** 
 * 網(wǎng)絡(luò)發(fā)送http請(qǐng)求,默認(rèn)為返回類型為json 
 * 
 * url: 必須,其他參數(shù)非必須 接口地址 
 * data:請(qǐng)求的參數(shù) Object或String 
 * successFun(dts):成功返回的回調(diào)函數(shù)，已自動(dòng)過(guò)濾微信端添加數(shù)據(jù),按接口約定,返回成功后的data數(shù)據(jù),過(guò)濾掉msg和status 
 * successErrorFun(msg):成功執(zhí)行請(qǐng)求,但是服務(wù)端認(rèn)為業(yè)務(wù)錯(cuò)誤,執(zhí)行其他行為,默認(rèn)彈出系統(tǒng)提示信息. 
 * failFun:接口調(diào)用失敗的回調(diào)函數(shù) 
 * completeFun:接口調(diào)用結(jié)束的回調(diào)函數(shù)（調(diào)用成功、失敗都會(huì)執(zhí)行） 
 * header:object,設(shè)置請(qǐng)求的 header , header 中不能設(shè)置 Referer 
 * method:默認(rèn)為 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; 
 
 //默認(rèn)頭為json 
 reqObj.header = { 'Content-Type': 'application/json' }; 
 if( header ) { 
  //覆蓋header 
  reqObj.header = header; 
 } 
 
 
 if( method ) { 
  reqObj.method = method; 
 } 
 reqObj.success = function( res ) { 
  var returnData = res.data; //將微信端結(jié)果過(guò)濾,獲取服務(wù)端返回的原樣數(shù)據(jù) 
  var status = returnData.status; //按接口約定,返回status時(shí),才調(diào)用成功函數(shù) 
  //console.log(res); 
  //正常執(zhí)行的業(yè)務(wù)函數(shù) 
  if( status == true ) { 
   if( successFun ) { 
    var dts = returnData.data; 
    successFun( dts );//回調(diào)，相當(dāng)于獲取到data后直接在回調(diào)里面處理賦值數(shù)據(jù) 
   } 
  } else if( status == false ) { 
   var msg = returnData.msg; 
   if( !successErrorFun ) { 
    console.log( msg ); 
   } else { 
    successErrorFun( msg ); 
   } 
 
  } else { 
   console.log( "服務(wù)端沒(méi)有按照接口約定格式返回?cái)?shù)據(jù)" ); 
  } 
 
 
 } 
 reqObj.fail = function( res ) { 
  if( failFun ) { 
   failFun( res ); 
  } 
 } 
 reqObj.complete = function( res ) { 
  if( completeFun ) { 
   completeFun( res ); 
  } 
 } 
 
 
 wx.request( reqObj ); 
} 
 
module.exports = { 
 r: r 
}

核心代碼就是上面這三個(gè)文件，接下來(lái)是demo文件做測(cè)試：：
demo.wxml：：

<import src="../../template/cityTemplate.wxml"/> 
<template is="city" data="{{...city}}" />

demo.js：：

var city = require( '../../common/cityTemplate' ); 
Page( { 
 data: { 
 
 }, 
 onLoad: function( options ) { 
 var _that = this; 
 //創(chuàng)建三級(jí)聯(lián)動(dòng)數(shù)據(jù)對(duì)象 ---- 這個(gè)city對(duì)象是固定的，只有請(qǐng)求的url是根據(jù)各自的服務(wù)端地址來(lái)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?yàn)槟０逍枰鶕?jù)這倆參數(shù)顯示 
  city: {}, 
  county: {}, 
  provinceIndex: 0, 
  cityIndex: 0, 
  countyIndex: 0, 
  cityUrl: "http://localhost:8282/phpserver/areas.php?type=city&fcode=",//type表示獲取地區(qū) fcode是一級(jí)code碼，到時(shí)具體根據(jù)后端請(qǐng)求參數(shù)修改 
  countyUrl: "http://localhost:8282/phpserver/areas.php?type=county&fcode=" 
  } 
 }) 
 var _url = "http://localhost:8282/phpserver/areas.php"; 
 var _data = { 'type': 'province', 'fcode': '0' }; 
 city.initCityFun( _that, _url, _data ); 
 } 
})

以上完整代碼文件，最終測(cè)試如下：