yii表单 CForm

使用CForm来创建一个表单列
      controller中

public function actionForm(){

        $model = new User;

        //实例化CForm生成一个表单对象

        $form = new CForm($model->getFMConfig(), $model);

        $this->performAjaxValidation($model);

        if($form->submitted() && $form->validate()){

//            dump($model->attributes);

            if(!$model->save()){

                dump($model->getErrors());

            }

        }

        $this->render('form',array(

            'form'=>$form,

        ));

    }
   user模型中

//返回表单生成器的配置文件

        public function getFMConfig(){

            return array(

//                'title'=>'表单',

//                'description'=>'干嘛的',

                'showErrorSummary'=>true,//是否显示所有错误

                'showErrors'=>true,//是否显示错误

                'activeForm'=>array(

                    'class'=>'CActiveForm',

                    'id'=>'user-active_form-form',

                    'enableAjaxValidation'=>true,

//                    'enableClientValidation'=>true,

                ),

                'elements'=>array(

                    'username'=>array(

                        'type'=>'text',

                        'maxlength'=>32,

                    ),

                    'city_id'=>array(

                        'type'=>'dropdownlist',

                        'prompt'=>'请选择',

                        'items'=>User::getCitys(),

                    ),

                ),

                'buttons'=>array(

                    'submit'=>array(

                        'type'=>'submit',

                        'label'=>'提交'

                    )

                ),

            );

        }
   views/form.php

<h1>添加用户信息</h1>

<div class="form">

    <?php echo $form;?>

</div>
在视图层只需要echo $form就可以生成如下表单

 

 

echo $form 对一个对象进行输出 会调用魔术方法__toString

public function __toString()     {         return $this->render();     }

我们看到实际上 他调用的是对象的render()方法，所以echo $form等同于$form->render();