AngularJS 无限滚动加载数据控件 ngInfiniteScroll

1、什么是 InfiniteScroll?
无限滚动(Infinite Scroll)也称为自动分页、滚动分页和无限分页。常用在图片、文章或其它列表形式的网页中,用来在滚动网页到页面底部的时候自动加载下一页的内容。
这种形式最早由推特(twitter)使用,后来必应图片搜索、谷歌图片搜 索、google reader等纷纷采用了这一项技术,于是靠滚动浏览器滚动条来翻页的技术慢慢在互联网上遍站开花。该技术非常适合移动端的数据自动加载。

2、什么是ngInfiniteScroll?
ngInfiniteScroll 是用于 AngularJS的无限滚动控件,特点是简单易用,是AngularJS社区里应用最为广泛的”触底加载”控件。

3、如何使用ngInfiniteScroll
只要以下4步就可以搞定ngInfiniteScroll :

<1>引用javascript文件(注意把js加载顺序)    
<script type='text/javascript' src='path/jquery.min.js'>script>
<script type='text/javascript' src='path/angular.min.js'>script>
<script type='text/javascript' src='path/ng-infinite-scroll.min.js'>script>
<2>声明对 ***infinite-scroll***的依赖
angular.module('myApplication', ['infinite-scroll']);   
<3>在html页面使用 infinite-scroll 元素
<div infinite-scroll="myPagingFunction()" infinite-scroll-distance="3"></div>
<4>ok,调用你的分页函数 myPagingFunction(),开始使用吧。使用细节参考[ngInfiniteScroll API文档](http://sroze.github.io/ngInfiniteScroll/documentation.html)。下附例子:
[ngInfiniteScroll 动态加载实例](http://sroze.github.io/ngInfiniteScroll/demo_async.html)

HTML代码:

<div ng-app='myApp' ng-controller='DemoController'>
  <div infinite-scroll='reddit.nextPage()' infinite-scroll-disabled='reddit.busy' infinite-scroll-distance='1'>
    <div ng-repeat='item in reddit.items'>
      <span class='score'>{{item.score}}span>
      <span class='title'>
        <a ng-href='{{item.url}}' target='_blank'>{{item.title}}a>
      span>
      <small>by {{item.author}} -
        <a ng-href='http://reddit.com{{item.permalink}}' target='_blank'>{{item.num_comments}} commentsa>
      small>
      <div style='clear: both;'>div>
    div>
    <div ng-show='reddit.busy'>Loading data...div>
  div>
div>

Javascript 代码(自动加载 Reddit):

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

myApp.controller('DemoController', function($scope, Reddit) {
  $scope.reddit = new Reddit();
});

// Reddit constructor function to encapsulate HTTP and pagination logic
myApp.factory('Reddit', function($http) {
  var Reddit = function() {
    this.items = [];
    this.busy = false;
    this.after = '';
  };

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

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

  return Reddit;
});

特别提醒:
容易犯的错误,把ng-repeat标签和infinite-scroll放在同一个

标签下:


<div infinite-scroll='pagerFunction()' ng-repeat='item in items'>
  {{item}}
div>

<div infinite-scroll='pagerFunction()'>
  <div ng-repeat='item in items'>{{item}}div>
div>

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