# prenext 上一篇下一篇(高級)標簽 ## 上下篇(數組)標簽 在內容頁，根據當前文檔調取上一篇、下一篇文檔。 ## 示例 獲取當前文檔上一篇 ``` <pre class="calibre16">``` <span class="token1">{</span>hkcms<span class="token1">:</span>prenext type<span class="token">=</span><span class="token4">"pre"</span> len<span class="token">=</span><span class="token4">"10"</span> dot<span class="token">=</span><span class="token4">"...."</span><span class="token1">}</span> <span class="token"><</span>div class<span class="token">=</span><span class="token4">"text-primary"</span><span class="token">></span><span class="token"><</span>a href<span class="token">=</span><span class="token4">"{$item.url}"</span><span class="token">></span><span class="token1">{</span>$item<span class="token1">.</span>title<span class="token1">}</span><span class="token"><</span><span class="token">/</span>a<span class="token">></span><span class="token"><</span><span class="token">/</span>div<span class="token">></span> <span class="token1">{</span><span class="token2">else</span> <span class="token">/</span><span class="token1">}</span> <span class="token"><</span>div<span class="token">></span>沒有上一篇了<span class="token"><</span><span class="token">/</span>div<span class="token">></span> <span class="token1">{</span><span class="token">/</span>hkcms<span class="token1">:</span>prenext<span class="token1">}</span> ``` ``` ## 參數 參數名稱可選值默認值是否必填說明typepre/next-是pre=調取上一篇，next調取下一篇id-item-指定變量名，例如id='obj'，模板調用如：{$item.action} 變成 {$obj.action}field-title-這里指定后結合len、dot參數生成len---限制標題長度dot---超出的標題尾部拼接字符num---設置獲取條數，默認是單條## 參數說明 - type，只能填寫pre(上一篇)、next(下一篇) 獲取上一篇數據 ``` <pre class="calibre16">``` <span class="token1">{</span>hkcms<span class="token1">:</span>prenext type<span class="token">=</span><span class="token4">"pre"</span><span class="token1">}</span> <span class="token"><</span>a href<span class="token">=</span><span class="token4">"{$item.url}"</span><span class="token">></span><span class="token1">{</span>$item<span class="token1">.</span>title<span class="token1">}</span><span class="token"><</span><span class="token">/</span>a<span class="token">></span> <span class="token1">{</span><span class="token">/</span>hkcms<span class="token1">:</span>prenext<span class="token1">}</span> ``` ``` - id，指定變量，默認是$item，如下改成obj后寫法 ``` <pre class="calibre16">``` <span class="token1">{</span>hkcms<span class="token1">:</span>prenext type<span class="token">=</span><span class="token4">"pre"</span> id<span class="token">=</span><span class="token4">"obj"</span><span class="token1">}</span> <span class="token"><</span>a href<span class="token">=</span><span class="token4">"{$obj.url}"</span><span class="token">></span><span class="token1">{</span>$obj<span class="token1">.</span>title<span class="token1">}</span><span class="token"><</span><span class="token">/</span>a<span class="token">></span> <span class="token1">{</span><span class="token">/</span>hkcms<span class="token1">:</span>prenext<span class="token1">}</span> ``` ``` - field，這里結合len、dot參數，如下：設置標題長度為10超出的加上“.....” ``` <pre class="calibre16">``` <span class="token1">{</span>hkcms<span class="token1">:</span>prenext type<span class="token">=</span><span class="token4">"pre"</span> len<span class="token">=</span><span class="token4">"10"</span> dot<span class="token">=</span><span class="token4">"....."</span><span class="token1">}</span> <span class="token"><</span>div<span class="token">></span><span class="token1">{</span>$item<span class="token1">.</span>title<span class="token1">}</span><span class="token"><</span><span class="token">/</span>div<span class="token">></span> <span class="token1">{</span><span class="token">/</span>hkcms<span class="token1">:</span>prenext<span class="token1">}</span> ``` ``` 效果 ``` <pre class="calibre16">``` 演示數據演示數據數據<span class="token1">.</span><span class="token1">.</span><span class="token1">.</span><span class="token1">.</span><span class="token1">.</span> ``` ``` `num` 數量屬性，可獲取多條上一篇或下一篇數據 ``` <pre class="calibre16">``` <span class="token1">{</span>hkcms<span class="token1">:</span>prenext type<span class="token">=</span><span class="token4">"pre"</span> num<span class="token">=</span><span class="token4">"10"</span> len<span class="token">=</span><span class="token4">"10"</span> dot<span class="token">=</span><span class="token4">"...."</span><span class="token1">}</span> <span class="token"><</span>a href<span class="token">=</span><span class="token4">"{$item['url']}"</span><span class="token">></span><span class="token1">{</span>$item<span class="token1">[</span><span class="token4">'title'</span><span class="token1">]</span><span class="token1">}</span><span class="token"><</span><span class="token">/</span>a<span class="token">></span> <span class="token1">{</span><span class="token2">else</span> <span class="token">/</span><span class="token1">}</span> <span class="token"><</span>div<span class="token">></span>沒有上一篇了<span class="token"><</span><span class="token">/</span>div<span class="token">></span> <span class="token1">{</span><span class="token">/</span>hkcms<span class="token1">:</span>prenext<span class="token1">}</span> ``` ``` ****另外可以增加{else /}，來判斷在沒有上一篇時的處理，如下**** ``` <pre class="calibre20">``` <span class="token1">{</span>hkcms<span class="token1">:</span>prenext type<span class="token">=</span><span class="token4">"pre"</span><span class="token1">}</span> <span class="token"><</span>div class<span class="token">=</span><span class="token4">"text-primary"</span><span class="token">></span><span class="token"><</span>a href<span class="token">=</span><span class="token4">"{$item['url']}"</span><span class="token">></span><span class="token1">{</span>$item<span class="token1">[</span><span class="token4">'title'</span><span class="token1">]</span><span class="token1">}</span><span class="token"><</span><span class="token">/</span>a<span class="token">></span><span class="token"><</span><span class="token">/</span>div<span class="token">></span> <span class="token1">{</span><span class="token2">else</span> <span class="token">/</span><span class="token1">}</span> <span class="token"><</span>div<span class="token">></span>沒有上一篇了<span class="token"><</span><span class="token">/</span>div<span class="token">></span> <span class="token1">{</span><span class="token">/</span>hkcms<span class="token1">:</span>prenext<span class="token1">}</span> ``` ```