如何訪問CakePHP 3 Helper中的變量

Question

如何在Helper中訪問CakePHP 3中設置爲視圖的變量？我沒有在文檔中找到任何內容。

在CakePHP 2.X這個曾經工作：

$this->_View->viewVars['foo'];

Answer 1

Reading the API helps.

655:  /** 
656:  * Returns the contents of the given View variable. 
657:  * 
658:  * @param string $var The view var you want the contents of. 
659:  * @param mixed $default The default/fallback content of $var. 
660:  * @return mixed The content of the named var if its set, otherwise $default. 
661:  */ 
662:  public function get($var, $default = null) 
663:  { 
664:   if (!isset($this->viewVars[$var])) { 
665:    return $default; 
666:   } 
667: 
668:   return $this->viewVars[$var]; 
669:  }