重写了create_links()
本帖最后由 bhbhjackyin 于 2009-4-17 20:35 编辑如果我写分页的时候是直接写sql然后使用CI分页,就是能够达到分页数字与对应的效果,如<a href="/page/4">4</a>,分页使用limitstart和limitend方式的话,如
从controller里$this->pagination->per_page,$this->uri->segment(3)用这两个传过来对应model的$pageSize,$pageNo
$limitStart=$pageSize * ($pageNo - 1);
$limitEnd=$pageSize; //offset
然后放到sql的最后limit ;
如果我的数据是7条,per_page显示2条的话,然后调用链接显示正常,但是发现
<a href="/playlists/index/4">3</a>数字3下链接是4,数字4链接是6,这就无法正常实现后面的
翻页了,
如果我per_page弄成1的话,links显示正常,但是数字2链接是1,3是2,7成了6根本没法显示完整,
基于这个我把create_links()重写了一下,代码如下:
/**
* Generate the pagination links
*
* @access public
* @return string
*/
function create_page_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)
{
return '';
}
// Determine the current page number.
$CI =& get_instance();
if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
{
if ($CI->input->get($this->query_string_segment) != 0)
{
$this->cur_page = $CI->input->get($this->query_string_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
}
else
{
if ($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==null)
{
$this->cur_page = 1;
}
// Is the page number beyond the result range?
// If so we show the last page
if ($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;
$start=1;
$end=$this->num_links;
if($this->cur_page==1){
$start=1;
$end=$this->num_links;
}
else{
$end=$this->cur_page+$this->num_links;
$start=$this->cur_page-$this->num_links;
if($start<=0)$start=1;
}
if($end>$num_pages)$end=$num_pages;
// Is pagination being used over GET or POST?If get, add a per_page query
// string. If post, add a trailing slash to the base URL if needed
if ($CI->config->item('enable_query_strings') === TRUE OR $this->page_query_string === TRUE)
{
$this->base_url = rtrim($this->base_url).'&'.$this->query_string_segment.'=';
}
else
{
$this->base_url = rtrim($this->base_url, '/') .'/';
}
// And here we go...
$output = '';
// Render the "First" link
if($this->cur_page !=1)
{
$output .= $this->first_tag_open.'<a href="'.$this->base_url.'">'.$this->first_link.'</a>'.$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 .= $this->prev_tag_open.'<a href="'.$this->base_url.($this->cur_page-1).'">'.$this->prev_link.'</a>'.$this->prev_tag_close;
}
// Write the digit links
for ($loop = $start ; $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 .= $this->num_tag_open.'<a href="'.$this->base_url.$loop.'">'.$loop.'</a>'.$this->num_tag_close;
}
}
}
// Render the "next" link
if ($this->cur_page < $num_pages)
{
$output .= $this->next_tag_open.'<a href="'.$this->base_url.($this->cur_page+1).'">'.$this->next_link.'</a>'.$this->next_tag_close;
}
// Render the "Last" link
if (($this->cur_page) < $num_pages)
{
$i = (($num_pages * $this->per_page) - $this->per_page);
$output .= $this->last_tag_open.'<a href="'.$this->base_url.$num_pages.'">'.$this->last_link.'</a>'.$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;
return $output;
}
这样就使用我的方式能正常工作了,不管如何调整per_page,可能还有小bug,我再测试去修复吧。注意现在调用就成了$this->pagination->create_page_links() 我没太看明白楼主的说明,这个到底修改了什么呢? 像Discuz这种,page=2,页面上显示的数字就是2
<a href="/page/2"></a>,显示第一页,最后一页的条件,还有如何计算start,end等我用我的方法弄了下。 CI 的分页所显示的是记录偏移量,而不是实际的页数,这有什么影响吗?
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