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jQuery实现的自动加载页面功能示例

onestopweb 人气:0

本文实例讲述了jQuery实现的自动加载页面功能。分享给大家供大家参考,具体如下:

demo.html:

<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>---------------</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>阅谁问君诵,水落清香浮</p></li>
<li style="opacity:0;-moz-opacity: 0;filter: alpha(opacity=0);"><p>+++++++++++++++</p></li>

scrollpagination.js:

(function( $ ){
 $.fn.scrollPagination = function(options) {
    var opts = $.extend($.fn.scrollPagination.defaults, options);
    var target = opts.scrollTarget;
    if (target == null){
      target = obj;
    }
    opts.scrollTarget = target;
    return this.each(function() {
     $.fn.scrollPagination.init($(this), opts);
    });
 };
 $.fn.stopScrollPagination = function(){
   return this.each(function() {
    $(this).attr('scrollPagination', 'disabled');
   });
 };
 $.fn.scrollPagination.loadContent = function(obj, opts){
   var target = opts.scrollTarget;
   var mayLoadContent = $(target).scrollTop()+opts.heightOffset >= $(document).height() - $(target).height();
   if (mayLoadContent){
     if (opts.beforeLoad != null){
      opts.beforeLoad();
     }
     $(obj).children().attr('rel', 'loaded');
     $.ajax({
       type: 'POST',
       url: opts.contentPage,
       data: opts.contentData,
       success: function(data){
        $(obj).append(data);
        var objectsRendered = $(obj).children('[rel!=loaded]');
        if (opts.afterLoad != null){
          opts.afterLoad(objectsRendered);
        }
       },
       dataType: 'html'
     });
   }
 };
 $.fn.scrollPagination.init = function(obj, opts){
   var target = opts.scrollTarget;
   $(obj).attr('scrollPagination', 'enabled');
   $(target).scroll(function(event){
    if ($(obj).attr('scrollPagination') == 'enabled'){
      $.fn.scrollPagination.loadContent(obj, opts);
    }
    else {
      event.stopPropagation();
    }
   });
   $.fn.scrollPagination.loadContent(obj, opts);
 };
 $.fn.scrollPagination.defaults = {
     'contentPage' : null,
     'contentData' : {},
     'beforeLoad': null,
     'afterLoad': null ,
     'scrollTarget': null,
     'heightOffset': 0
 };
})( jQuery );

index.html:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script type="text/javascript" src="js/jquery-1.10.1.min.js"></script>
<script type="text/javascript" src="js/scrollpagination.js"></script>
<script type="text/javascript">
$(function(){
  $('#content').scrollPagination({
    'contentPage': 'demo.html', //你要搜索结果的页面
    'contentData': {},//你可以通过 children().size() 知道哪里是分页
    //谁该怎么滚动?在这个例子中,完整的窗口
    'scrollTarget': $(window),
    //在页面到达结束之前,从多少像素开始加载?
    'heightOffset': 10,
    //前负荷,一些功能,可能显示一个加载DIV
    'beforeLoad': function(){
      $('#loading').fadeIn();
    },
    'afterLoad': function(elementsLoaded){
      //加载后,一些功能的动画结果和隐藏预载的div
      $('#loading').fadeOut();
      var i = 0;
      $(elementsLoaded).fadeInWithDelay();
      //如果超过100结果加载停止分页(仅用于测试)
      if ($('#content').children().size() > 100){
        $('#nomoreresults').fadeIn();
        $('#content').stopScrollPagination();
      }
    }
  });
  //元件中的延迟元件的褪色代码
  $.fn.fadeInWithDelay = function(){
    var delay = 0;
    return this.each(function(){
      $(this).delay(delay).animate({opacity:1}, 200);
      delay += 100;
    });
  };
});
</script>
</head>
<body>
<div id="demo">
  <div style="height:2000px;"></div>
  <ul id="content" style=" margin:0 auto; width:800px; color:#f60; background-color:eee;">
    <li><p>内容开始</p></li>
  </ul>
  <div class="loading" id="loading">加载中</div>
  <div class="loading" id="nomoreresults">结束了</div>
</div>
</body>
</html>

效果图如下:

希望本文所述对大家jQuery程序设计有所帮助。

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