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Yii不依赖Model的表单生成器用法实例_PHP

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Release: 2016-05-31 18:15:50
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本文实例讲述了Yii不依赖Model的表单生成器用法。分享给大家供大家参考。具体实现方法如下:

默认的Yii的表单生成器只需要这样就可以了:

代码如下:

$form = new CForm('application.views.site.loginForm', $model);


这里的application.views.site.loginForm也可以是配置数组。但是如果$model参数不传的话是会报错的:Fatal error: Call to a member function isAttributeSafe()
比如我要生成一个组表单,但是我不想依赖于model,根据配置就可以生成一组表单该怎么办,

默认生成的表单的label是根据$model->attributes来显示的,所以我做了2件事:

1.继承CFormInputElement覆盖renderLabel方法,将label显示成自己配置的element的label

2.继承CForm覆盖renderElement方法,$element instanceof UCFormInputElement,并覆盖render方法,将Elements和getButtons循环输出
直接上代码:
app/protected/extensions/UCForm.php

代码如下:

/**
 * @author Ryan
 */
class UCForm extends CForm
{
 public function render()
 {
  $output = $this->renderBegin();
  foreach ($this->getElements() as $element)
  {
   $output .= $element->render();
  }
  foreach ($this->getButtons() as $button)
  {
   $output .= $button->render();
  }
  $output .= $this->renderEnd();
  return $output;
 }
 public function renderElement($element)
 {
  if (is_string($element))
  {
   if (($e = $this[$element]) === null && ($e = $this->getButtons()->itemAt($element)) === null)
    return $element;
   else
    $element = $e;
  }
  if ($element->getVisible())
  {
   //UCFormInputElement 代替 CFormInputElement
   if ($element instanceof UCFormInputElement)
   {
    if ($element->type === 'hidden')
     return "

n" . $element->render() . "
n";
    else
     return "
n" . $element->render() . "
n";
   }
   else if ($element instanceof CFormButtonElement)
    return $element->render() . "n";
   else
    return $element->render();
  }
  return '';
 }
}


再来个简单的调用示例:

代码如下:

/**
 * @author Ryan
 */
class PlayerSearchController extends Controller
{
 public function actionIndex()
 {
  $config = array(
      'class' => 'ddd',
      'action'=>'',
      'elements' => array(
   '

',
   'username' => array(
       'label'=>'用户名啊',//注意这里的label
       'type' => 'text',
       'maxlength' => 32,
       'value' => ''
   ),
   '

',
   'password' => array(
       'label'=>'昵称啊',//注意这里的label
       'type' => 'password',
       'maxlength' => 32,
       'value' => ''
   ),
      ),
      'buttons' => array(
   'login' => array(
       'type' => 'submit',
       'label' => 'Login',
   ),
      ),
  );
  $model = new CFormModel();
  $form = new UCForm($config, $model);
  $this->render('index', compact('form'));
 }
}

希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。

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source:php.cn
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