如何为yii2扩展kartik fileInput小部件

Question

Im新到Yii2，我需要修改Yii2中kartiks FileInput小部件的registerAssetBundle（）函数。我意识到这是在供应商文件夹中，所以我想做一个覆盖。仅供参考，这是使用高级模板。任何人都可以告诉我为什么我不能重写或我做错了什么？ Yii只是没有选择这个文件/不呛/没有错误/没有，只是用它的快乐方式，并呈现我的页面正常。

在我有一个名为FileInputOveride.php文件共同\组件：

namespace common\components; 
    use Yii; 
    use \kartik\file\FileInput; 

    class FileInputOveride extends \kartik\file\FileInput 
    { 
    //...override function, ...do stuff... 

编辑-Heres一些代码：

这里是在_form.php这个顶部是用声明的FileInput

use yii\helpers\Html; 
use yii\widgets\ActiveForm; 
use yii\helpers\Url; 
use yii\bootstrap\Modal; 
use kartik\widgets\FileInput; <-- if I take this out, it errors that it cant find ::FileInput 
use common\components\FileInputOveride; <--this has no effect 

下面这条线是某些查看HTML，直到我们到达的FileInput场，看起来像这样：

<?= 
       //fileinput widget for single file upload 
       $form->field($model, 'cover_file')->widget(FileInput::classname(), 
        [ 
        'options'=> 
         [ 
          'accept'=>'image/*', 
          'multiple' => false, 
          'id'=>'cover_file', 

         ], 
        'pluginOptions' => 
         [ 
          'uploadUrl' => $upload_url, 
          'maxFileCount' => 1, 
          'allowedFileExtensions' => ['jpg', 'png','jpeg'], 
          'initialPreviewShowUpload' => false, 
          'uploadAsync'=> false, 
          'autoReplace'=>true, 

         ], 
        'pluginEvents' => 
         [ 
          'fileuploaded'=>"function(event, data, previewId, index){ 
           $.get('./call-image?id=".$model->id."', function(response) { 
             $('#thumb-container-image').html(response); 
           }); 
          }", 

         ], 
       ])->label(false); 
      ?> 

想用我自己的FileInputOveride.php覆盖registerAssetBundle（）函数在这个卡尔蒂克FileInput.php：

namespace kartik\file; 

use Yii; 
use yii\helpers\ArrayHelper; 
use yii\helpers\Html; 
use kartik\base\InputWidget; 
use kartik\base\TranslationTrait; 

/** 
* Wrapper for the Bootstrap FileInput JQuery Plugin by Krajee. The FileInput widget is styled for Bootstrap 3.x with 
* ability to multiple file selection and preview, format button styles and inputs. Runs on all modern browsers 
* supporting HTML5 File Inputs and File Processing API. For browser versions IE9 and below, this widget will 
* gracefully degrade to normal HTML file input. 
* 
* @see http://plugins.krajee.com/bootstrap-fileinput 
* @see https://github.com/kartik-v/bootstrap-fileinput 
* 
* @author Kartik Visweswaran <kartikv2@gmail.com> 
* @since 2.0 
* @see http://twitter.github.com/typeahead.js/examples 
*/ 
class FileInput extends InputWidget 
{ 

，这里是整个FileInputOveride.php文件：

namespace common\components; 
use Yii; 

class FileInputOveride extends \kartik\file\FileInput 
{ 
    /** 
    * Registers the asset bundle and locale 
    */ 
    public function registerAssetBundle() 
    { 
     $view = $this->getView(); 
     if ($this->resizeImages) { 
      PiExifAsset::register($view); 
      $this->pluginOptions['resizeImage'] = true; 
     } 
     $theme = ArrayHelper::getValue($this->pluginOptions, 'theme'); 
     if (!empty($theme) && in_array($theme, self::$_themes)) { 
      FileInputThemeAsset::register($view)->addTheme($theme); 
     } 
     if ($this->sortThumbs) { 
      SortableAsset::register($view); 
     } 
     if ($this->purifyHtml) { 
      DomPurifyAsset::register($view); 
      $this->pluginOptions['purifyHtml'] = true; 
     } 

//above is the existing code   
//below is the additional code i added to this function 
     $assetsRegistered = FileInputAsset::register($view)->addLanguage($this->language, '', 'js/locales'); 

     //array of pages/paths we dont want to include the asset on 
     $pageArray = ['releases/update']; 

     //array of assets we dont want to use for the above pages 
     $fileArray = ['js/fileinput.js']; 

     //for each page, see if the file(s) specified is/are included, if so, unset them in the assets array 
     foreach($pageArray as $path) 

      if(in_array($path, $pageArray)){ 

      foreach($fileArray as $file){ 

       if(in_array($file,$assetsRegistered->js)){ 
        $key= array_search($file, $assetsRegistered->js); 
        unset($assetsRegistered->js[$key]); 
       } 
      } 
     } 
    } 

} 

另外，我还可以使用语法从其操作中列出属于操作/视图的资产。

这样：

public function actionUpdate(){ 
//show me all the js registered to this page 

谢谢大家！

Answer 1

在你的_form.php文件中使用“FileInputOveride :: classname（）”而不是“FileInput :: classname（）” - 然后你可以删除用于卡丁输入的使用行。当你扩展任何插件时，你必须调用你的插件类名称，而不是你扩展的插件。