學(xué)習(xí)Angularjs分頁指令

更新時間：2016年07月01日 15:17:09 投稿：lijiao

這篇文章主要和大家一起學(xué)習(xí)Angularjs分頁指令，代碼很詳細(xì)，文章結(jié)構(gòu)緊湊，感興趣的小伙伴們可以參考一下

在項目中許多頁面都用到了分頁，然后每個頁面都有許多重復(fù)的分頁代碼，于是自己寫了一份簡易的分頁指令，簡化頁面的代碼，且容易維護(hù)，寫在博客中當(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js文件，page-directive.js，用來寫分頁的指令代碼，這個文件中包含了分頁的模板，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">\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"><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"><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.分頁樣式控制
建議寫在單獨的.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.分頁查詢方法
我在factory中自定義了分頁查詢的方法，共用，方便代碼的維護(hù)。在angular中與后臺的交互默認(rèn)是異步的，我這里寫成同步查詢了，首先定義js文件pageSync.service.js，以下是factory的全部內(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，初始化的時候為before，只要經(jīng)過該分頁方法，則字段值變?yōu)閍fter
    * before表示未經(jīng)過該分頁方法，after表示經(jīng)過該分頁方法，
    * 前臺頁面加載的規(guī)則：為before時表示表格無數(shù)據(jù)，為after且pataData.count==0時無數(shù)據(jù)，否則視為有數(shù)據(jù)，
    * 也可以說是記錄的一個時間狀態(tài)（訪問數(shù)據(jù)前及返回數(shù)據(jù)后）
    */
   json.loadTime = 'after';
   deferred.resolve(json);
  });
  return deferred.promise;
 };
 // 總頁數(shù)小于等于7時 顯示所有的頁數(shù)
 var getPagesLow = function(totalPage) {
  var temp = [];
  for (var i=1; i<totalPage+1; i++) {
   temp.push(i);
  }
  return temp;
 };
 // 總頁數(shù)大于7時 根據(jù)當(dāng)前頁獲取7個頁碼數(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;
 };
 // 項目中table的高度是根據(jù)瀏覽器窗口的高度計算的來的，是動態(tài)的
 // 因為要把分頁固定在table最下方，所以無數(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）.頁面上的代碼：

我的代碼中分頁是寫在table中的tfoot里面了，prev()、next()、loadPage(page)均為在頁面對應(yīng)的controller中定義的方法

<table>
<thead>
 <tr>
  <th>序號</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) {});

在分頁查詢之前要做一些準(zhǔn)備工作：

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

然后再controller中寫如下的方法

// 分頁查詢
$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
$scope.next = function() {
 if ($scope.pageData.currentPage < $scope.pageData.totalPage) {
  PageSync.next(url, $scope.pageData.currentPage, $scope.pageSize).then(function(data) {
   $scope.pageData = data;
  });
 }
};
// 上一頁
$scope.prev = function() {
 if ($scope.pageData.currentPage > 1) {
  PageSync.prev(url, $scope.pageData.currentPage, $scope.pageSize).then(function (data) {
   $scope.pageData = data;
  });
 }
};
// 點擊頁碼跳轉(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?zhí)顚懱D(zhuǎn)頁碼！');
 } else if(intPage <= 0 || intPage > $scope.pageData.totalPage) {
  alert('跳轉(zhuǎn)頁碼應(yīng)大于0,小于總頁數(shù)'+$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
最終的實現(xiàn)效果如下圖：