小編給大家分享一下微信小程序中怎么使用picker封裝省市區(qū)三級(jí)聯(lián)動(dòng),希望大家閱讀完這篇文章之后都有所收獲,下面讓我們一起去探討吧!
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微信小程序 使用picker封裝省市區(qū)三級(jí)聯(lián)動(dòng)實(shí)例
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?/strong>
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。不要問我服務(wù)端的為啥是這樣的,我也不懂,剛?cè)腴T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】
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::
{{province.name[provinceIndex]}} --二級(jí)市區(qū)-- 0}}"> {{city.name[cityIndex]}} --三級(jí)地區(qū)-- 0}}"> {{county.name[countyIndex]}}
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::
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:
這里存在一個(gè)bug,開啟下拉刷新和picker組件的下拉會(huì)重疊了,不知道是開發(fā)工具原因,還是還為修改的bug。。。只能等微信方面更新消息給反饋了
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