我在我的codeigniter项目中创建了ajax分页。 它使用搜索，复选框和下拉列表过滤数据。 如果我到目前为止使用分页链接，一切正常。 但是，例如，当我在详细信息页面上并单击后退按钮时，它不会保留更改。它会回到默认状态。 当我从详细视图中按下后退按钮时，如何保持过滤器更改。
这是我的代码。 ajax分页
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Ajax_pagination{
var $base_url = '';
var $total_rows = '';
var $per_page = 10;
var $num_links = 2;
var $cur_page = 0;
var $first_link = 'First';
var $next_link = '»';
var $prev_link = '«';
var $last_link = 'Last';
var $uri_segment = 3;
var $full_tag_open = '<div class="pagination">';
var $full_tag_close = '</div>';
var $first_tag_open = '';
var $first_tag_close = ' ';
var $last_tag_open = ' ';
var $last_tag_close = '';
var $cur_tag_open = ' <b>';
var $cur_tag_close = '</b>';
var $next_tag_open = ' ';
var $next_tag_close = ' ';
var $prev_tag_open = ' ';
var $prev_tag_close = '';
var $num_tag_open = ' ';
var $num_tag_close = '';
var $target = '';
var $anchor_class = '';
var $show_count = true;
var $link_func = 'getData';
var $loading = '.loading';
/**
* Constructor
* @access public
* @param array initialization parameters
*/
function CI_Pagination($params = array()){
if (count($params) > 0){
$this->initialize($params);
}
log_message('debug', "Pagination Class Initialized");
}
/**
* Initialize Preferences
* @access public
* @param array initialization parameters
* @return void
*/
function initialize($params = array()){
if (count($params) > 0){
foreach ($params as $key => $val){
if (isset($this->$key)){
$this->$key = $val;
}
}
}
// Apply class tag using anchor_class variable, if set.
if ($this->anchor_class != ''){
$this->anchor_class = 'class="' . $this->anchor_class . '" ';
}
}
/**
* Generate the pagination links
* @access public
* @return string
*/
function create_links(){
// If our item count or per-page total is zero there is no need to continue.
if ($this->total_rows == 0 OR $this->per_page == 0){
return '';
}
// Calculate the total number of pages
$num_pages = ceil($this->total_rows / $this->per_page);
// Is there only one page? Hm... nothing more to do here then.
if ($num_pages == 1){
$info = 'Showing : ' . $this->total_rows;
return $info;
}
// Determine the current page number.
$CI =& get_instance();
if ($CI->uri->segment($this->uri_segment) != 0){
$this->cur_page = $CI->uri->segment($this->uri_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
$this->num_links = (int)$this->num_links;
if ($this->num_links < 1){
show_error('Your number of links must be a positive number.');
}
if ( ! is_numeric($this->cur_page)){
$this->cur_page = 0;
}
// Is the page number beyond the result range?
// If so we show the last page
if ($this->cur_page > $this->total_rows){
$this->cur_page = ($num_pages - 1) * $this->per_page;
}
$uri_page_number = $this->cur_page;
$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);
// Calculate the start and end numbers. These determine
// which number to start and end the digit links with
$start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
$end = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;
// Add a trailing slash to the base URL if needed
$this->base_url = rtrim($this->base_url, '/') .'/';
// And here we go...
$output = '';
// SHOWING LINKS
if ($this->show_count){
$curr_offset = $CI->uri->segment($this->uri_segment);
$info = 'Showing ' . ( $curr_offset + 1 ) . ' to ' ;
if( ( $curr_offset + $this->per_page ) < ( $this->total_rows -1 ) )
$info .= $curr_offset + $this->per_page;
else
$info .= $this->total_rows;
$info .= ' of ' . $this->total_rows . ' | ';
$output .= $info;
}
// Render the "First" link
if ($this->cur_page > $this->num_links){
$output .= $this->first_tag_open
. $this->getAJAXlink( '' , $this->first_link)
. $this->first_tag_close;
}
// Render the "previous" link
if ($this->cur_page != 1){
$i = $uri_page_number - $this->per_page;
if ($i == 0) $i = '';
$output .= $this->prev_tag_open
. $this->getAJAXlink( $i, $this->prev_link )
. $this->prev_tag_close;
}
// Write the digit links
for ($loop = $start -1; $loop <= $end; $loop++){
$i = ($loop * $this->per_page) - $this->per_page;
if ($i >= 0){
if ($this->cur_page == $loop){
$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
}else{
$n = ($i == 0) ? '' : $i;
$output .= $this->num_tag_open
. $this->getAJAXlink( $n, $loop )
. $this->num_tag_close;
}
}
}
// Render the "next" link
if ($this->cur_page < $num_pages){
$output .= $this->next_tag_open
. $this->getAJAXlink( $this->cur_page * $this->per_page , $this->next_link )
. $this->next_tag_close;
}
// Render the "Last" link
if (($this->cur_page + $this->num_links) < $num_pages){
$i = (($num_pages * $this->per_page) - $this->per_page);
$output .= $this->last_tag_open . $this->getAJAXlink( $i, $this->last_link ) . $this->last_tag_close;
}
// Kill double slashes. Note: Sometimes we can end up with a double slash
// in the penultimate link so we'll kill all double slashes.
$output = preg_replace("#([^:])//+#", "\\1/", $output);
// Add the wrapper HTML if exists
$output = $this->full_tag_open.$output.$this->full_tag_close;
?>
<script>
function getData(page){
$.ajax({
method: "POST",
url: "<?php echo $this->base_url; ?>"+page,
data: { page: page },
beforeSend: function(){
$('<?php echo $this->loading; ?>').show();
},
success: function(data){
$('<?php echo $this->loading; ?>').hide();
$('<?php echo $this->target; ?>').html(data);
}
});
}
</script>
<?php
return $output;
}
function getAJAXlink($count, $text) {
$pageCount = $count?$count:0;
return '<a href="javascript:void(0);"' . $this->anchor_class . ' onclick="'.$this->link_func.'('.$pageCount.')">'. $text .'</a>';
}
}
控制器
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Posts extends CI_Controller {
function __construct() {
parent::__construct();
$this->load->model('post');
$this->load->library('Ajax_pagination');
$this->perPage = 2;
}
public function index(){
$data = array();
//total rows count
$totalRec = count($this->post->getRows());
//pagination configuration
$config['target'] = '#postList';
$config['base_url'] = base_url().'posts/ajaxPaginationData';
$config['total_rows'] = $totalRec;
$config['per_page'] = $this->perPage;
$config['link_func'] = 'searchFilter';
$this->ajax_pagination->initialize($config);
//get the posts data
$data['posts'] = $this->post->getRows(array('limit'=>$this->perPage));
//load the view
$this->load->view('posts/index', $data);
}
function ajaxPaginationData(){
$conditions = array();
//calc offset number
$page = $this->input->post('page');
if(!$page){
$offset = 0;
}else{
$offset = $page;
}
//set conditions for search
$keywords = $this->input->post('keywords');
$sortBy = $this->input->post('sortBy');
if(!empty($keywords)){
$conditions['search']['keywords'] = $keywords;
}
if(!empty($sortBy)){
$conditions['search']['sortBy'] = $sortBy;
}
//total rows count
$totalRec = count($this->post->getRows($conditions));
//pagination configuration
$config['target'] = '#postList';
$config['base_url'] = base_url().'posts/ajaxPaginationData';
$config['total_rows'] = $totalRec;
$config['per_page'] = $this->perPage;
$config['link_func'] = 'searchFilter';
$this->ajax_pagination->initialize($config);
//set start and limit
$conditions['start'] = $offset;
$conditions['limit'] = $this->perPage;
//get posts data
$data['posts'] = $this->post->getRows($conditions);
//load the view
$this->load->view('posts/ajax-pagination-data', $data, false);
}
}
查看脚本
<script>
function searchFilter(page_num) {
page_num = page_num?page_num:0;
var keywords = $('#keywords').val();
var sortBy = $('#sortBy').val();
$.ajax({
type: 'POST',
url: '<?php echo base_url(); ?>posts/ajaxPaginationData/'+page_num,
data:'page='+page_num+'&keywords='+keywords+'&sortBy='+sortBy,
beforeSend: function () {
$('.loading').show();
},
success: function (html) {
$('#postList').html(html);
$('.loading').fadeOut("slow");
}
});
}
</script>
答案 0 :(得分：0)
基本上我们需要做的是修改一些逻辑/添加一些，以便每个变量page，sortBy和keywords存储在会话变量中ajax这样当我们离开页面并回来时我们的分页是一样的。在这种情况下，所需要的只是向ajaxPaginationData提供一个空的帖子数据的AJAX调用：
function ajaxPaginationData() {
$this->load->library('session'); // if you haven't already
$conditions = array();
// Page (offset)
$page = $this->input->post('page');
if (!empty($page)) {
$offset = $page;
$this->session->set_userdata('se_page', $page);
} elseif ($this->session->has_userdata('se_page')) {
$offeset = $this->session->se_page;
} else {
$offset = 0;
}
// Keywords and Sortby
$keywords = $this->input->post('keywords');
$sortBy = $this->input->post('sortBy');
if (!empty($keywords)) {
$conditions['search']['keywords'] = $keywords;
$this->session->set_userdata('se_keywords', $keywords);
} elseif ($this->session->has_userdata('se_keywords')) {
$conditions['search']['keywords'] = $this->session->se_keywords;
}
if (!empty($sortBy)) {
$conditions['search']['sortBy'] = $sortBy;
$this->session->set_userdata('se_sortby', $sortBy);
} elseif ($this->session->has_userdata('se_sortby')) {
$conditions['search']['sortBy'] = $this->session->se_sortby;
}
// total rows count
$totalRec = count($this->post->getRows($conditions));
// pagination configuration
$config['target'] = '#postList';
$config['base_url'] = base_url() . 'posts/ajaxPaginationData';
$config['total_rows'] = $totalRec;
$config['per_page'] = $this->perPage;
$config['link_func'] = 'searchFilter';
$this->ajax_pagination->initialize($config);
//set start and limit
$conditions['start'] = $offset;
$conditions['limit'] = $this->perPage;
//get posts data
$data['posts'] = $this->post->getRows($conditions);
//load the view
$this->load->view('posts/ajax-pagination-data', $data, false);
}