AngularJS：实现页面滚动到底自动加载数据的功能

要实现这个功能，可以通过https://github.com/sroze/ngInfiniteScroll这个第三方控件来实现。步骤如下：

1. 下载ng-infinite-scroll.js程序http://sroze.github.io/ngInfiniteScroll/ 目前版本是1.0.0

2. 如果你是用的jQuery2.0以上版本，还需要修改ng-infinite-scroll.js程序，将所有的将所有的$window.xxx改为$(window).xxx, elem.xxx改为$(elem).xxx

3. 在HTML中引入script

<script type='text/javascript' src='path/to/jquery.min.js'></script>
<script type='text/javascript' src='path/to/angular.min.js'></script>
<script type='text/javascript' src='path/to/ng-infinite-scroll.min.js'></script>

4. HTML示例代码如下：

 <div ng-controller='PostListController'>
     <div infinite-scroll='demo.nextPage()' infinite-scroll-disabled='demo.busy' infinite-scroll-distance='1'>
         <div ng-repeat='item in demo.items'>
             <p>
                 <input type="hidden" value="{{item.PostId}}" />
                 <label>{{item.WriterName}}</label>
                 <label>{{item.WriterMail}}</label>
                 <label>{{item.WreckerName}}</label>
                 <label>{{item.StartDate}}</label>
                 <label>{{item.Location}}</label>
                 <label>{{item.Story}}</label>
             </p>
         </div>
         <div ng-show='demo.busy'>Loading data...</div>
     </div>
 </div>

5. PostListController.js代码如下：

 var ftitAppModule = angular.module('ftitApp', ['infinite-scroll']);

 ftitAppModule.controller('PostListController',
     function ($scope, Demo) {
         $scope.demo = new Demo();
 });

 // 创建后台数据交互工厂
 ftitAppModule.factory('Demo', function ($http) {
     var Demo = function () {
         this.items = [];
         this.busy = false;
         this.after = '';
         this.page = 0;
     };

     Demo.prototype.nextPage = function () {
         if (this.busy) return;
         this.busy = true;

         var url = "http://192.168.3.95:7002/api/post/nextpage?id=" + this.page + "&callback=JSON_CALLBACK";
         $http.jsonp(url).success(function (data) {
             var items = data;
             for (var i = 0; i < items.length; i++) {
                 this.items.push(items[i]);
             }
             this.after = "t3_" + this.items[this.items.length - 1].id;
             this.busy = false;
             this.page += 1;
         }.bind(this));
     };

     return Demo;
 });

这样就实现了页面拖动到底后，从服务器自动加载数据的功能。