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學(xué)習(xí)Angularjs分頁(yè)指令

2019-11-20 09:34:25
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在項(xiàng)目中許多頁(yè)面都用到了分頁(yè),然后每個(gè)頁(yè)面都有許多重復(fù)的分頁(yè)代碼,于是自己寫(xiě)了一份簡(jiǎn)易的分頁(yè)指令,簡(jiǎn)化頁(yè)面的代碼,且容易維護(hù),寫(xiě)在博客中當(dāng)做備份,方便以后查閱。
以下是定義指令及其應(yīng)用的步驟:

1.指令定義
定義一個(gè)js文件,page-directive.js,用來(lái)寫(xiě)分頁(yè)的指令代碼,這個(gè)文件中包含了分頁(yè)的模板,以下是js文件中的所有代碼:

'use strict';(function () { angular.module('template/pageInit/pageInit.html', []).run([  '$templateCache',function($templateCache) {   $templateCache.put('template/pageInit/pageInit.html',    '<ul class="pagination-main">/n'+    ' <li class="prev-page" ng-class="{disabled:pageData.currentPage==1}" title="首頁(yè)">/n'+    '  <a href="javascript:void(0);" ng-click="on_loadPage(1)"><span class="fa fa-fast-backward"></span></a>/n'+    ' </li>/n'+    ' <li class="prev-page" ng-class="{disabled:pageData.currentPage==1 }">/n'+    '  <a href="javascript:void(0);" ng-click="on_prev()" title="上一頁(yè)"><span class="fa fa-step-backward"></span></a>/n'+    ' </li>/n'+    ' <li class="data-page" ng-repeat="page in pageData.pages" ng-class="{/'first-page/': page==1, /'last-page/': page==pageData.totalPage}">/n'+    '  <a ng-if="page!=/'.../'" href="javascript:void(0);" ng-class="{/'bg-custom/': page==pageData.currentPage}" ng-click="on_loadPage(page, tabData)">{{ page }}</a>/n'+    '  <a ng-if="page==/'.../'" href="javascript:void(0);" ng-class="{/'bg-custom/': page==pageData.currentPage}" ng-click="">{{ page }}</a>/n'+    ' </li>/n'+    ' <li class="next-page" ng-class="{disabled:pageData.currentPage==pageData.totalPage}">/n'+    '  <a href="javascript:void(0);" ng-click="on_next()" title="下一頁(yè)"><span class="fa fa-step-forward"></span></a>/n'+    ' </li>/n'+    ' <li class="skip-page"><div><input type="text" placeholder="" ng-model="inpage">/n'+    '  <input type="button" value="跳轉(zhuǎn)" ng-click="on_loadPage(inpage)"></div>/n'+    ' </li>/n'+    ' <li class="data-num"><a class="cursor-text" href="#"><span>共{{pageData.count}}條</span></a></li>/n'+    '</ul>/n'+    ''   );  } ]); angular.module('pageInit', ['template/pageInit/pageInit.html'])  .directive('pageInit',['pageinitTemplate', function(pageinitTemplate) {   return {    restrict  : 'AE',    templateUrl: function (tElement, tAttrs) {     return tAttrs.templateUrl || pageinitTemplate.getPath();    },    replace  : true,    scope   : {     pageData    : '=',     prev      : '&',     next      : '&',     loadPage    : '&'    },    link      : function(scope, element, attrs) {     scope.on_prev = function() {      if(scope.prev) {       scope.prev();      }     };     scope.on_next = function() {      if(scope.next) {       scope.next();      }     };     scope.on_loadPage = function(page) {      scope.inpage = undefined;      if(scope.loadPage) {       scope.loadPage({page: page});      }     };    }   };  }])  .provider('pageinitTemplate', function () {   var templatePath = 'template/pageInit/pageInit.html';   this.setPath = function (path) {    templatePath = path;   };   this.$get = function () {    return {     getPath: function () {      return templatePath;     }    };   };  });}).call(window);

2.分頁(yè)樣式控制
建議寫(xiě)在單獨(dú)的.css文件中,首先新建pageSync.css文件,以下是具體樣式

.pagination-main { display: inline-block; padding-left: 0; margin: 0 0; border-radius: 4px; vertical-align: middle;}.pagination-main li.prev-page > a { border: 0;}.pagination-main li.next-page > a { border: 0; border-left: 1px; margin-left: 0;}.pagination-main li.first-page > a { border-top-left-radius: 0; border-bottom-left-radius: 0;}.pagination-main li.last-page > a { border-top-right-radius: 0; border-bottom-right-radius: 0;}.pagination-main li div { width: 80px;border: 1px solid #DDDDDD;background-color: #ffffff;float: left;padding: 0;}.pagination-main li.skip-page input[type='text'] { width: 24px;height: 20px;border: 0;text-align: center;}.pagination-main li.skip-page input[type='button'] { padding: 0 4px 1px 10px;border: 0;border-left: 1px solid #dddddd;background-color: #ffffff}.pagination-main li.data-num > a { border: 0; margin-left: 0;}.pagination-main > li { display: inline;}.pagination-main > li:first-child > a,.pagination-main > li:first-child > span { /*margin-left: 0; border-top-left-radius: 4px; border-bottom-left-radius: 4px;*/}.pagination-main > .active > a,.pagination-main > .active > span,.pagination-main > .active > a:hover,.pagination-main > .active > span:hover,.pagination-main > .active > a:focus,.pagination-main > .active > span:focus { z-index: 2; color: #fff; cursor: default; background-color: #428bca; border-color: #428bca;}.pagination-main > li > a,.pagination-main > li > span { position: relative; float: left; /*padding: 6px 12px;*/ padding: 1px 8px; margin-left: -1px; line-height: 1.42857143; color: #428bca; text-decoration: none; background-color: #fff; border: 1px solid #ddd;}.pagination-main > .disabled > span,.pagination-main > .disabled > span:hover,.pagination-main > .disabled > span:focus,.pagination-main > .disabled > a,.pagination-main > .disabled > a:hover,.pagination-main > .disabled > a:focus { color: #999; cursor: not-allowed; background-color: #fff; border-color: #ddd;}

3.分頁(yè)查詢(xún)方法
我在factory中自定義了分頁(yè)查詢(xún)的方法,共用,方便代碼的維護(hù)。在angular中與后臺(tái)的交互默認(rèn)是異步的,我這里寫(xiě)成同步查詢(xún)了,首先定義js文件pageSync.service.js,以下是factory的全部?jī)?nèi)容:

'use strict';angular.module('app').factory('PageSync', ['$http', '$q', function Page($http, $q) { var rowCollectionPage = []; var totalPage = 1; var pages = []; var endPage = 1; var load = function(url, currentPage, pageSize,deferred) {  var json = {rowCollectionPage: [], totalPage: 1, currentPage:currentPage ? currentPage:1, pages: []};  $http.get(url).success(function(rows) {   rowCollectionPage = setPageRow(rows.list, pageSize);   // 獲取總頁(yè)數(shù)   totalPage = Math.ceil(rows.count / pageSize);   endPage = totalPage;   // 生成數(shù)字鏈接   if (totalPage <= 7) {    pages = getPagesLow(totalPage);   } else {    pages = getPagesHigh(currentPage, totalPage);   }   json.rowCollectionPage = rowCollectionPage;   json.totalPage = totalPage==0 ? 1 : totalPage;   json.currentPage = currentPage;   json.pages = pages;   json.count = rows.count;   json.pageSize = pageSize;   /**    * 自定義字段,初始化的時(shí)候?yàn)閎efore,只要經(jīng)過(guò)該分頁(yè)方法,則字段值變?yōu)閍fter    * before表示未經(jīng)過(guò)該分頁(yè)方法,after表示經(jīng)過(guò)該分頁(yè)方法,    * 前臺(tái)頁(yè)面加載的規(guī)則:為before時(shí)表示表格無(wú)數(shù)據(jù),為after且pataData.count==0時(shí)無(wú)數(shù)據(jù),否則視為有數(shù)據(jù),    * 也可以說(shuō)是記錄的一個(gè)時(shí)間狀態(tài)(訪問(wèn)數(shù)據(jù)前及返回?cái)?shù)據(jù)后)    */   json.loadTime = 'after';   deferred.resolve(json);  });  return deferred.promise; }; // 總頁(yè)數(shù)小于等于7時(shí) 顯示所有的頁(yè)數(shù) var getPagesLow = function(totalPage) {  var temp = [];  for (var i=1; i<totalPage+1; i++) {   temp.push(i);  }  return temp; }; // 總頁(yè)數(shù)大于7時(shí) 根據(jù)當(dāng)前頁(yè)獲取7個(gè)頁(yè)碼數(shù) var getPagesHigh = function(currentPage, totalPage) {  var temp = [];  if (currentPage < 4) {   temp = [1, 2, 3, 4, 5, '...', totalPage];  } else if ((totalPage - currentPage) <= 3) {   temp = [    totalPage - 6, totalPage - 5, totalPage - 4,    totalPage - 3, totalPage - 2, totalPage - 1, totalPage   ];  } else {   temp = [    currentPage - 2, currentPage - 1, currentPage,    currentPage + 1, currentPage + 2, '...', totalPage   ];  }  return temp; }; // 項(xiàng)目中table的高度是根據(jù)瀏覽器窗口的高度計(jì)算的來(lái)的,是動(dòng)態(tài)的 // 因?yàn)橐逊猪?yè)固定在table最下方,所以無(wú)數(shù)據(jù)的用空行進(jìn)行代替 var setPageRow = function(rowArr, pageSize) {  var temp = [];  if (rowArr != undefined) {   for (var i = 0; i < rowArr.length; i++) {    temp.push(rowArr[i]);   }   for (var j = 0; j < pageSize - rowArr.length; j++) {    temp.push({});   }  } else {   for (var k = 0; k < pageSize; k++) {    temp.push({});   }  }  return temp; }; return {  load: function(url, currentPage, pageSize) {   var deferred = $q.defer();   url += '&' + currentPage + '&' + pageSize;   return load(url, currentPage, pageSize, deferred);  },  next: function(url, currentPage, pageSize) {   var deferred = $q.defer();   if (currentPage < endPage) {    currentPage++;   }   url += '&' + currentPage + '&' + pageSize;   return load(url, currentPage, pageSize, deferred);  },  prev: function(url, currentPage, pageSize) {   var deferred = $q.defer();   currentPage--;   url += '&' + currentPage + '&' + pageSize;   return load(url, currentPage, pageSize, deferred);  },  loadPage: function(url, currentPage, pageSize, page) {   var deferred = $q.defer();   if (currentPage != page) {    currentPage = page;    url += '&' + currentPage + '&' + pageSize;    return load(url, currentPage, pageSize, deferred);   }  } }}]);

4.使用指令

1).頁(yè)面上的代碼:

我的代碼中分頁(yè)是寫(xiě)在table中的tfoot里面了,prev()、next()、loadPage(page)均為在頁(yè)面對(duì)應(yīng)的controller中定義的方法

<table><thead> <tr>  <th>序號(hào)</th>  <th>列名1</th>  <th>列名2</th>  <th style="width: 150px;text-align: center;">操作</th> </tr></thead><tbody> <tr ng-if="!noTableData" ng-repeat="row in pageData.rowCollectionPage">  <td>{{!!row.id ? $index+1+(pageData.currentPage-1)*pageSize : ''}}</td>  <td>{{row.args1}}</td>  <td>{{row.args2}}</td>  <td style="text-align: center;"><a href='#'>修改</a></td> </tr> <tr ng-if="noTableData" ng-repeat="data in pageData.rowCollectionPage">  <td ng-if="$index == 0" colspan="4" style="text-align: center;">沒(méi)有數(shù)據(jù)!</td>  <td ng-if="$index != 0" colspan="4"></td> </tr> </tbody><tfoot> <tr>  <td style="text-align: center;" colspan="6">   <div>    <page-init page-data="pageData" prev="prev()" next="next()" load-page="loadPage(page)"></page-init>   </div>  </td> </tr></tfoot></table>

2).controller中的代碼

首先要引用factory,將PageSync在controller中引用,如下:

angular.module('app').controller('MyCtrl', function(PageSync) {});

在分頁(yè)查詢(xún)之前要做一些準(zhǔn)備工作:

//pageData中設(shè)置分頁(yè)數(shù)據(jù)集合、總頁(yè)數(shù)、頁(yè)碼集合、數(shù)據(jù)總數(shù),loadTime為自定義的參數(shù),用來(lái)記錄時(shí)間狀態(tài)(訪問(wèn)數(shù)據(jù)前及返回?cái)?shù)據(jù)后)
$scope.pageData = {rowCollectionPage: [], totalPage: 1, currentPage:1, pages: [],count: 0, loadTime: 'before'};
// 這里用來(lái)計(jì)算table的高度,根據(jù)實(shí)際情況來(lái)。
$scope.tabHeight = $scope.height-48-37-10-42-5;
// 計(jì)算實(shí)際中一頁(yè)有多少行數(shù)據(jù)
$scope.pageSize = parseInt(($scope.tabHeight-15-34-34-39)/34);

然后再controller中寫(xiě)如下的方法

// 分頁(yè)查詢(xún)$scope.load = function(row) { $scope.surgeonPageData.rowCollectionPage = Common.setPageRow([],$scope.pageSize); $scope.noSurgeonData = false; $scope.surgeonPageData.loadTime = 'before'; PageSync.load(url, $scope.pageData.currentPage, $scope.pageSize).then(function(data) {  $scope.pageData = data;  if(($scope.pageData.loadTime=='after'&& $scope.pageData.count==0) || $scope.pageData.loadTime=='before') {   $scope.noTableData = true;  } });};// 下一頁(yè)$scope.next = function() { if ($scope.pageData.currentPage < $scope.pageData.totalPage) {  PageSync.next(url, $scope.pageData.currentPage, $scope.pageSize).then(function(data) {   $scope.pageData = data;  }); }};// 上一頁(yè)$scope.prev = function() { if ($scope.pageData.currentPage > 1) {  PageSync.prev(url, $scope.pageData.currentPage, $scope.pageSize).then(function (data) {   $scope.pageData = data;  }); }};// 點(diǎn)擊頁(yè)碼跳轉(zhuǎn)$scope.loadPage = function(page) { $scope.inpage = undefined; var intPage; if (typeof page == 'string') {  if(page!="") {   intPage = parseInt(page, 10);  } else {   intPage = 0;  } } else {  intPage = page; } if ($scope.pageData.totalPage <= 1) { } else if (intPage == undefined || intPage == null) {  alert('請(qǐng)?zhí)顚?xiě)跳轉(zhuǎn)頁(yè)碼!'); } else if(intPage <= 0 || intPage > $scope.pageData.totalPage) {  alert('跳轉(zhuǎn)頁(yè)碼應(yīng)大于0,小于總頁(yè)數(shù)'+$scope.pageData.totalPage); } else if ($scope.pageData.currentPage != page) {  PageSync.loadPage(url, $scope.pageData.currentPage, $scope.pageSize, page).then(function (data) {   $scope.pageData = data;  }); }};

5.結(jié)果
最終的實(shí)現(xiàn)效果如下圖:

以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持武林網(wǎng)。

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