public function render($template, $vdata=array())
	{
	    if (!$this->templateExists($template)) {
	        return 'Template is not exists:' . $this->getTemplateRelativePath($template);
	    }
	    
		// view vars
	    if ($this->getData()->keys()) {
	        extract($this->getData()->all(), EXTR_SKIP);
		}
		if ($vdata instanceof Collection) {
		    extract($vdata->all(), EXTR_SKIP);
		} elseif ($vdata) {
		    extract($vdata, EXTR_SKIP);
		}
		unset($vdata);
		
		// layout
		$_layout = static::getLayoutFromTemplate($template);
		if (is_null($_layout)) {
		    if ($this->getLayout() && $template !== $this->getLayout() && ($this->options['nolayout'] || !in_array($template, $this->options['nolayout']))) {
		        // layout template
		        // 对于 phtml 模板: {include $__content_template__}
		        // 对于 php 模板:   <?php include $this->include($__content_template__); ?\>
		        $__content_template__ = $template;
		        $template = $this->getLayout();
		    }
		} elseif ($_layout) {
		    $__content_template__ = $template;
		    $template = $_layout;
		}
		
		ob_start();
		require $this->getCompiledFile($template);
		
		$content = ob_get_contents();
		ob_end_clean();
		
		return $content;
	}