如何使用zend框架製作自定義圖像文件格式

Question

如何通過擴展zend表單元素來製作自定義圖像文件？在HTML輸出結果是象下面這樣：

<div class="image-file-wrapper"> 
    <img src="yourimagepath" /> 
    <br /> 
    <input id="image-file" name="image-file" type="file" /> 
</div> 

UPDATE：

我的自定義表單元素

class Engine_Form_Element_ImageFile extends Zend_Form_Element_File { 
public $helper = 'FormImageFile'; 

protected $_image; 

public function setImage($src) { 
    $this->_image = $src; 

    return $this;  
} 

public function loadDefaultDecorators() { 
    if($this->loadDefaultDecoratorsIsDisabled()) { 
     return; 
    } 

    $decorators = $this->getDecorators(); 

    if(empty($decorators)) { 
     $this->addDecorator('ViewHelper'); 
     Engine_Form::addDefaultDecorators($this); 
    } 
} 
} 

我的自定義視圖助手：

class Engine_View_Helper_FormImageFile extends Zend_View_Helper_FormElement { 
public function formImageFile($name, $value = null, $attribs = null, $options = null) { 
    return '<div class="image-file-wrapper"><img src="test.png" /><input type="file" /></div>';  
}  
} 

當我嘗試添加它，

$this->addElement('ImageFile', 'imageFile', array('label' => 'Test Image')); 

錯誤發生：

Warning: Exception caught by form: No file decorator found... unable to render file element Stack Trace: #0 C:\xampp\htdocs\NEOBBS_v6\library\Zend\Form\Decorator\FormElements.php(101): Zend_Form_Element_File->render() #1 C:\xampp\htdocs\NEOBBS_v6\library\Zend\Form.php(2904): Zend_Form_Decorator_FormElements->render('') #2 C:\xampp\htdocs\NEOBBS_v6\library\Zend\Form.php(2920): Zend_Form->render() #3 C:\xampp\htdocs\NEOBBS_v6\application\themes\admin\settings.phtml(8): Zend_Form->__toString() #4 C:\xampp\htdocs\NEOBBS_v6\library\Zend\View.php(108): include('C:\xampp\htdocs...') #5 C:\xampp\htdocs\NEOBBS_v6\library\Zend\View\Abstract.php(880): Zend_View->_run('C:\xampp\htdocs...') #6 C:\xampp\htdocs\NEOBBS_v6\library\Zend\Controller\Action\Helper\ViewRenderer.php(897): Zend_View_Abstract->render('settings.phtml') #7 C:\xampp\htdocs\NEOBBS_v6\library\Zend\Controller\Action.php(243): Zend_Controller_Action_Helper_ViewRenderer->renderScript('settings.phtml', NULL) #8 C:\xampp\htdocs\NEOBBS_v6\application\modules\admin\contr in C:\xampp\htdocs\NEOBBS_v6\library\Zend\Form.php on line 2925 

如何解決呢？

由於提前，

布賴恩

Answer 1

使用Zend_Form_Decorator_ViewScript。詳情：http://framework.zend.com/manual/en/zend.form.standardDecorators.html#zend.form.standardDecorators.viewScript