How to import the node class into a title field of a view?
As far as I understand, you want to add a class name to the title field of your nodes listed in a view. (1) Views provide this functionality by default:



Adds the class to the selected html element, &lt;span&gt; is by default.
It can be used as a field wrapper.

(2) In case this is not suitable for you, you may very well use view's "rewrite results" :



It can be used to wrap the field's text.

(3) Lastly there is always the preprocess_views_view_fields solution where you can edit your field's attributes: 

if($view-&gt;name == 'view-name') {
  $vars['fields']['title']-&gt;wrapper_prefix = '&lt;div class="views-field views-field-title my-class"&gt;';
}


It can be used as a field wrapper.