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从ios中的epub获取封面图片(fetch Cover Image from epub in ios)

 我想在阅读表中显示epub文件的书籍封面图像。 在我的iOS应用程序中，我为epub文件添加了“Open In”支持。 因此，当我导航到我的书阅读应用程序时，我想首先在书架上显示书籍的封面图像然后想要加载该书。 请帮我从ios app中的epub book中获取封面图片。 

I want to display Book Cover Image of epub file in my Reading table. In my iOS application I have added "Open In" support for epub files. So when i navigate to my book reading app I want to show book's cover image in shelf first and then want to load that book. Please help me to fetch Cover Image from epub book in ios app.

原文：https://stackoverflow.com/questions/34545838

更新时间：2023-08-31 22:08

最满意答案

 您可以将col-sm-6更改为col-xs-6 （它将适用于x小屏幕和小屏幕）  
 然后删除col-lg-4因为它不需要（类col-md-4适用于从中等到所有更大的尺寸，除非另有说明）  
 完成后，你可以简单地在最后一列添加一个偏移量，如下所示： class="col-xs-6 col-xs-offset-3 col-md-4 col-md-offset-0"  
 基本上，如果xs偏移3列（然后将其居中），它将删除中等或更高屏幕的偏移量。  
 见下面的演示  
 
 
  
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<div class="row">
  <div class="col-xs-6 col-md-4">
    <figure class="box-1">
      <img class="services-imgs" src="http://lorempixel.com/300/300" alt="rehab" />
      <figcaption class="figcaption"><a href="serviços.html">Reabilitação Vestibular</a>
      </figcaption>
    </figure>
  </div>
  <div class="col-xs-6 col-md-4">
    <figure class="box-1">
      <img class="services-imgs" src="http://lorempixel.com/300/300" alt="drenagem" />
      <figcaption class="figcaption"><a href="serviços.html">Fisioterapia Estética</a>
      </figcaption>
    </figure>
  </div>
  <div class="col-xs-6 col-xs-offset-3 col-md-4 col-md-offset-0">
    <figure class="box-1">
      <img class="services-imgs" src="http://lorempixel.com/300/300" alt="traumato-ortopédica" />
      <figcaption class="figcaption"><a href="serviços.html">Fisioterapia Traumato-Ortopédica</a>
      </figcaption>
    </figure>
  </div>
</div> 
  
 

You can change col-sm-6 to col-xs-6 (it will apply to x-small and small screens) 
Then remove the col-lg-4 as it is not needed (the class col-md-4 applies from medium to all bigger sizes, unless specified differently) 
Having done that, you can simply add an offset to the last column like this: class="col-xs-6 col-xs-offset-3 col-md-4 col-md-offset-0" 
Basically, if xs offset it by 3 columns (which then centers it) and it removes the offset for medium or higher screens. 
See demo below 
 
 
  
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous">

<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

<div class="row">
  <div class="col-xs-6 col-md-4">
    <figure class="box-1">
      <img class="services-imgs" src="http://lorempixel.com/300/300" alt="rehab" />
      <figcaption class="figcaption"><a href="serviços.html">Reabilitação Vestibular</a>
      </figcaption>
    </figure>
  </div>
  <div class="col-xs-6 col-md-4">
    <figure class="box-1">
      <img class="services-imgs" src="http://lorempixel.com/300/300" alt="drenagem" />
      <figcaption class="figcaption"><a href="serviços.html">Fisioterapia Estética</a>
      </figcaption>
    </figure>
  </div>
  <div class="col-xs-6 col-xs-offset-3 col-md-4 col-md-offset-0">
    <figure class="box-1">
      <img class="services-imgs" src="http://lorempixel.com/300/300" alt="traumato-ortopédica" />
      <figcaption class="figcaption"><a href="serviços.html">Fisioterapia Traumato-Ortopédica</a>
      </figcaption>
    </figure>
  </div>
</div>

从ios中的epub获取封面图片(fetch Cover Image from epub in ios)

最满意答案

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