Question

在drupal 7中，我使用函数image_style_url('style', uri)生成带有样式的新图像并返回图像的路径。那么在drupal 8中会有什么而不是它呢？感谢

Answer 1

use Drupal\image\Entity\ImageStyle;

$path = 'public://images/image.jpg';
$url = ImageStyle::load('style_name')->buildUrl($path);

Answer 2

您应尽可能尝试使用新的Drupal功能。

相反，请使用：

use Drupal\file\Entity\File;
use Drupal\image\Entity\ImageStyle;

$fid = 123;
$file = File::load($fid);
$image_uri = ImageStyle::load('your_style-name')->buildUrl($file->getFileUri());

根据https://www.drupal.org/node/2050669编辑：

$original_image = 'public://images/image.jpg';

// Load the image style configuration entity
use Drupal\image\Entity\ImageStyle;
$style = ImageStyle::load('thumbnail');

$uri = $style->buildUri($original_image);
$url = $style->buildUrl($original_image);

Answer 3

在您的控制器和Drupal的其他OOP部分中，您可以使用：

use Drupal\image\Entity\ImageStyle;

$path = 'public://images/image.jpg';
$url = ImageStyle::load('style_name')->buildUrl($path);

在YOUR_THEME.theme文件中，Error: Class 'ImageStyle' not found in YOURTHEMENAME_preprocess_node可以使用以下内容进行操作

 $path = 'public://images/image.jpg';
 $style = \Drupal::entityTypeManager()->getStorage('image_style')->load('thumbnail');
 $url = $style->buildUrl($path);

另一种方法是提供一个可渲染数组，让drupal Render引擎渲染它。

$render = [
    '#theme' => 'image_style',
    '#style_name' => 'thumbnail',
    '#uri' => $path,
    // optional parameters
];

Answer 4

我发现我经常想要预处理图像，以便将图像样式应用于节点或段落类型上的图像。在许多情况下，我创建了一个段落，允许用户选择图像的宽度作为百分比。在预处理中，我会检查宽度的值并应用正确的图像样式。

use Drupal\image\Entity\ImageStyle;

function THEME_preprocess_paragraph__basic_content(&$vars) {
  //get the paragraph
  $paragraph = $vars['paragraph'];

  //get the image
  $images = $paragraph->get('field_para_image');
  //get the images value, in my case I only have one required image, but if you have unlimited image, you could loop thru $images
  $uri = $images[0]->entity->uri->value;

  //This is my field that determines the width the user wants for the image and is used to determine the image style
  $preset = $paragraph->get('field_column_width')->value;

  $properties = array();
  $properties['title'] = $images[0]->getValue()['title'];
  $properties['alt'] = $images[0]->getValue()['alt'];

  //this is where the Image style is applied
  switch($preset) {
     case 'image-20':
       $properties['uri'] = ImageStyle::load('width_20_percent')->buildUrl($uri);
       break;
     case 'image-45':
       $properties['uri'] = ImageStyle::load('width_45_percent')->buildUrl($uri);
       break;
     case 'image-55':
       $properties['uri'] = ImageStyle::load('width_55_percent')->buildUrl($uri);
       break;
     case 'image-100':
       $properties['uri'] = ImageStyle::load('width_100_percent')->buildUrl($uri);
       break;
  }
  //assign to a variable that the twig template can use
  $vars['basic_image_display'] = $properties;
}

在这个例子中，我正在预处理一个名为＆＃34; basic_content＆＃34;的特定段落类型。但你可以用节点预处理做同样的事情。继续我的例子，我将有一个名为 paragraph - basic_content.html.twig 的树枝模板来处理该段落类型的显示。

在twig文件中显示图像会是这样的。

<img class="img-responsive" src="{{basic_image_display['uri']}}" alt="{{ basic_image_display['alt'] }}" title="{{ basic_image_display['title'] }}"/>

Answer 5

通过.module文件中的经典Drupal数据库查询为我工作：

$query = \Drupal::database()->select('file_managed', 'f' );
$query->addField('f', 'uri');
$pictures = $query->execute()->fetchAll();

foreach ($pictures as $key => $picture) {

   $largePictureUri = entity_load('image_style', 'large')->buildUrl($picture->uri);
}

Answer 6

$view_mode = $variables['content']['field_media_image']['0']['#view_mode'];
$display_content = \Drupal::service('entity_display.repository')
->getViewDisplay('media', 'image', $view_mode)->build($media_entity);
$style = ImageStyle::load($display_content['image'][0]['#image_style']); $original_image = $media_entity->get('image')->entity->getFileUri();
$destination = $style->buildUri($original_image);

这是从媒体图像实体中获取图像样式的方式。

Answer 7

我在Drupal 8中使用了这段代码。它工作正常。

$fid = 374; //get your file id, this value just for example 
$fname = db_select('file_managed', 'f')->fields('f', array('filename'))->condition('f.fid', $fid)->execute()->fetchField();
$url = entity_load('image_style', 'YOUR_STYLE_NAME')->buildUrl($fname);

Drupal 8图像与图像样式

7 个答案: