首先感谢这里的博主，提供了思路，不过在调用 $model->b_image->extensionName 这个时，总提示错误，调呀调的，调烦了，就自己写一个吧。

其他不多说，看步骤

一、下载yii官方提供的图片处理扩展  具体配置跟官方的一样，这个扩展提供了两套调用方式，我选择了第一种，就是在配置文件里进行添加组件的方式，来张图，有图有真象哈

二、在protected目录下新建一utils目录，在目录下新建Upload.php文件，代码如下

     request->baseUrl.'images/uploads/'.$name;			//图片处理			$image = Yii::app()->image->load($tmp_name);			$image->resize($width, $height)->rotate(0)->quality(100)->sharpen(20);			$image->save($path);			// move_uploaded_file($tmp_name,$path);			return $path;		}	}}

三、在 protected/config/main.php 这个文件里，把刚才的utils目录载入

'import'=>array(

'application.models.*',

'application.components.*',

'application.extensions.*',

'application.helpers.*',

'application.utils.*',

'application.modules.boss.modules.srbac.controllers.SBaseController',

),

四、写代码

model部分

添加图片验证规则，其他规则根据自己需要进行添加，这里我只添加需要展示的代码(views和controller一样，不再说明了)

public function rules()	{		return array(			array('b_image', 'file', 'types' => 'jpg,gif,png', 'on' => 'insert'),		);	}

views

     beginWidget('CActiveForm', array('id'=>'iot-books-form',// Please note: When you enable ajax validation, make sure the corresponding// controller action is handling ajax validation correctly.// There is a call to performAjaxValidation() commented in generated controller code.// See class documentation of CActiveForm for details on this.'enableAjaxValidation'=>false,'htmlOptions'=>array('enctype'=>'multipart/form-data'),//这个一定要加，否则获取不到图片)); ?>
     
		
      labelEx($model,'b_image'); ?>		
      isNewRecord){				?>				
      				
      		
      60,'maxlength'=>255)); ?>		
      error($model,'b_image'); ?>	
     

controller

/**	 * Creates a new model.	 * If creation is successful, the browser will be redirected to the 'view' page.	 */	public function actionCreate()	{		$model=new IotBooks;		// Uncomment the following line if AJAX validation is needed		// $this->performAjaxValidation($model);		if(isset($_POST['IotBooks']))		{			$imgUrl = '';			if($_FILES){				$name = $_FILES['IotBooks']['name']['b_image']; //上传图片原名				$type = $_FILES['IotBooks']['type']['b_image']; //上传图片mime类型				$tmp_name = $_FILES['IotBooks']['tmp_name']['b_image']; //上传图片临时存放位置				$width = 100; //缩略图宽				$height = 100; //缩略图高				$imgUrl = Upload::createImageLink($name, $type, $tmp_name, $width, $height);			}			$model->attributes = $_POST['IotBooks'];			$model->b_image = $imgUrl;			if($model->save())				$this->redirect(array('view','id'=>$model->bid));		}		$this->render('create',array(			'model'=>$model,		));	}	/**	 * Updates a particular model.	 * If update is successful, the browser will be redirected to the 'view' page.	 * @param integer $id the ID of the model to be updated	 */	public function actionUpdate($id)	{		$model=$this->loadModel($id);		// Uncomment the following line if AJAX validation is needed		// $this->performAjaxValidation($model);		if(isset($_POST['IotBooks']))		{				$imgUrl = $model->b_image;			if($_FILES && ($_FILES['IotBooks']['name']['b_image'] != '')){				$name = $_FILES['IotBooks']['name']['b_image']; //上传图片原名				$type = $_FILES['IotBooks']['type']['b_image']; //上传图片mime类型				$tmp_name = $_FILES['IotBooks']['tmp_name']['b_image']; //上传图片临时存放位置				$width = 100; //缩略图宽				$height = 100; //缩略图高				$imgUrl = Upload::createImageLink($name, $type, $tmp_name, $width,$height);			}			$model->attributes = $_POST['IotBooks'];			$model->b_image = $imgUrl;			if($model->save())				$this->redirect(array('view','id'=>$model->bid));		}		$this->render('update',array(			'model'=>$model,		));	}

完工了，试一下吧