Home CMS Tutorial DEDECMS How to modify thumbnails in DedeCMS version 5.1

How to modify thumbnails in DedeCMS version 5.1

Dec 20, 2019 am 09:48 AM
dedecms

How to modify thumbnails in DedeCMS version 5.1

DedeCMS 5.1 版缩略图怎么修改?

以前曾收录过这篇文章[Dedecms生成漂亮整齐的缩略图],我做了下尝试,生成缩略图的时候还是会有问题。今天看到这个文章,做个补充。

  

推荐学习:织梦cms

勾选 “提取第一张图片为缩略图” 实际是将第一张图当作缩略图 并没有生成带"_lit"的小图 

修改文件:\dede\action\article_add_action.php 

先看原代码 

代码如下:

//自动获取缩略图 
if($autolitpic==1 && $litpic==''){ 
$litpic = GetDDImgFromBody($body); 
}
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大概意思应该就是“缩略图=获取图像从主题内容”

也就是上面说的实际是第一张原图 这就是问题所在

参考了4.X里提取缩略图代码,更改为:

代码如下:

//自动获取缩略图-改 
if($autolitpic==1 && $litpic==''){ 
$cfg_medias_dir = str_replace('/','\/',$cfg_medias_dir); 
$picname = preg_replace("/.+?".$cfg_medias_dir."(.*)( |\"|').*$/isU",$cfg_medias_dir."$1",$body); 
if(eregi("\.(jpg|gif|png)$",$picname)){ 
if(ereg("_lit\.",$picname)) $litpic = $picname; 
else $litpic = GetDDImage('ddfirst',$picname,0); 
} 
}
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同理\dede\action\article_eidt_action.php更改为:

代码如下:

//自动获取缩略图-改 
if($autolitpic==1 && empty($litpic)){ 
$cfg_medias_dir = str_replace('/','\/',$cfg_medias_dir); 
$picname = preg_replace("/.+?".$cfg_medias_dir."(.*)( |\"|').*$/isU",$cfg_medias_dir."$1",$body); 
if(eregi("\.(jpg|gif|png)$",$picname)){ 
if(ereg("_lit\.",$picname)) $litpic = $picname; 
else $litpic = GetDDImage('ddfirst',$picname,0); 
} 
}
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然后将这两个文件 复制覆盖到\dede\下。 

OK!这样就能打到勾选“提取第一张...”生成缩略图的目的了。 

缩略图变形 参考[Dedecms生成漂亮整齐的缩略图] 

需修改文件:\include\inc_photograph.php 

找到:($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH); 共三处。 

改为:($ni,$im,0,0,$src_X,$src_Y,$ftoW,$ftoH,$srcW,$srcH); 

修改了缩图函数,就能在原图中截取居中的、最大面积的符合自定义缩略图长宽比列的一部分生成缩略图。

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