jQuery+PHP实现浏览更多内容
本例与《无刷新动态加载数据,滚动条加载》的区别就在于这个是点击加载的,2个的数据库结构相同,都比较简单明了
XML/HTML Code
- <div id="more">
- <div class="single_item">
- <div class="element_head">
- <div class="date"></div>
- <div class="author"></div>
- </div>
- <div class="content"></div>
- </div>
- <a href="javascript:;" class="get_more">点击加载更多内容</a>
- </div>
data.php
PHP Code
- <?php
- include("../../conn.php");
- $last = $_POST['last'];
- $amount = $_POST['amount'];
- $query=mysql_query("select * from content order by id limit $last,$amount");
- while ($row=mysql_fetch_array($query)) {
- $sayList[] = array(
- 'content'=>$row['message'],
- 'author'=>$row['id'],
- 'date'=>date('y-m-d H:i',strtotime($row['updatetime']))
- );
- }
- echo json_encode($sayList);
- ?>
jquery.more.js
JavaScript Code
- (function( $ ){
- var target = null;
- var template = null;
- var lock = false;
- var variables = {
- 'last' : 0
- }
- var settings = {
- 'amount' : '5',
- 'address' : 'data.php',
- 'format' : 'json',
- 'template' : '.single_item',
- 'trigger' : '.get_more',
- 'scroll' : 'false',
- 'offset' : '100',
- 'spinner_code': ''
- }
- var methods = {
- init : function(options){
- return this.each(function(){
- if(options){
- $.extend(settings, options);
- }
- template = $(this).children(settings.template).wrap('<div/>').parent();
- template.css('display','none')
- $(this).append('<div class="more_loader_spinner">'+settings.spinner_code+'</div>')
- $(this).children(settings.template).remove()
- target = $(this);
- if(settings.scroll == 'false'){
- $(this).find(settings.trigger).bind('click.more',methods.get_data);
- $(this).more('get_data');
- }
- else{
- if($(this).height() <= $(this).attr('scrollHeight')){
- target.more('get_data',settings.amount*2);
- }
- $(this).bind('scroll.more',methods.check_scroll);
- }
- })
- },
- check_scroll : function(){
- if((target.scrollTop()+target.height()+parseInt(settings.offset)) >= target.attr('scrollHeight') && lock == false){
- target.more('get_data');
- }
- },
- debug : function(){
- var debug_string = '';
- $.each(variables, function(k,v){
- debug_string += k+' : '+v+'n';
- })
- alert(debug_string);
- },
- remove : function(){
- target.children(settings.trigger).unbind('.more');
- target.unbind('.more')
- target.children(settings.trigger).remove();
- },
- add_elements : function(data){
- //alert('adding elements')
- var root = target
- // alert(root.attr('id'))
- var counter = 0;
- if(data){
- $(data).each(function(){
- counter++
- var t = template
- $.each(this, function(key, value){
- if(t.find('.'+key)) t.find('.'+key).html(value);
- })
- //t.attr('id', 'more_element_'+ (variables.last++))
- if(settings.scroll == 'true'){
- // root.append(t.html())
- root.children('.more_loader_spinner').before(t.html())
- }else{
- // alert('...')
- root.children(settings.trigger).before(t.html())
- }
- root.children(settings.template+':last').attr('id', 'more_element_'+ ((variables.last++)+1))
- })
- }
- else methods.remove()
- target.children('.more_loader_spinner').css('display','none');
- if(counter < settings.amount) methods.remove()
- },
- get_data : function(){
- // alert('getting data')
- var ile;
- lock = true;
- target.children(".more_loader_spinner").css('display','block');
- $(settings.trigger).css('display','none');
- if(typeof(arguments[0]) == 'number') ile=arguments[0];
- else {
- ile = settings.amount;
- }
- $.post(settings.address, {
- last : variables.last,
- amount : ile
- }, function(data){
- $(settings.trigger).css('display','block')
- methods.add_elements(data)
- lock = false;
- }, settings.format)
- }
- };
- $.fn.more = function(method){
- if(methods[method])
- return methods[ method ].apply( this, Array.prototype.slice.call( arguments, 1 ));
- else if(typeof method == 'object' || !method)
- return methods.init.apply(this, arguments);
- else $.error('Method ' + method +' does not exist!');
- }
- })(jQuery)
原文地址:http://www.freejs.net/article_jquerywenzi_64.html