Extract Url & Title from link field in Drupal 8?

I'm trying to retrieve the URL and the Title values of a Link field in Drupal 8.

In my custom controller, I retrieve the nodes with:

$storage = \Drupal::entityManager()->getStorage('node');
$nids = $storage->getQuery()
    ->condition('type', 'partners')
    ->condition('status', 1)
    ->execute();

$partners = $storage->loadMultiple($nids);

When I loop throught all my nodes, to preprocess vars I'll give to my view, I would like to retrieve the URL and the Title.

foreach ($partners as $key => $partner) {
    $variables['partners'][] = array(
        'image' => $partner->field_logo->entity->url(),
        'url'   => $partner->field_link->value, // Can't retrieve values of link field
    );
}

Unfortunately, I don't found how to retrieve the URL and the Title of field_link.

Thanks for your help.

At the node level, inside your Twig template you can use:

{{ content.field_link.0['#url'] }} & {{ content.field_link.0['#title'] }}

For example:

<a href="{{ content.field_link.0['#url'] }}">{{ content.field_link.0['#title'] }}</a>

field_link being the name of the link field in question.