YII 类库手册
> YII 类库手册 > CBaseController
包 system.web
继承 abstract class CBaseController » CComponent
子类 CController, CWidget
源自 1.0
版本 $Id: CBaseController.PHP 3515 2011-12-28 12:29:24Z mDOMba $
源码
CBaseController is the base class for CController and CWidget.

It provides the common functionalities shared by controllers who need to render views.

CBaseController also implements the support for the following features:
  • Clips : a clip is a piece of captured output that can be inserted elsewhere.
  • Widgets : a widget is a self-contained sub-controller with its own view and model.
  • Fragment cache : fragment cache selectively caches a portion of the output.


To use a widget in a view, use the following in the view: 
$this->widget('path.to.widgetClass',array('property1'=>'value1',...));
or 
$this->beginWidget('path.to.widgetClass',array('property1'=>'value1',...));
// ... display other contents here
$this->endWidget();


To create a clip, use the following: 
$this->beginClip('clipID');
// ... display the clip contents
$this->endClip();
Then, in a different view or place, the captured clip can be inserted as: 
echo $this->clips['clipID'];


Note that $this in the code above refers to current controller so, for example, if you need to Access clip from a widget where $this refers to widget itself you need to do it the following way: 

echo $this->getController()->clips['clipID'];


To use fragment cache, do as follows, 
if($this->beginCache('cacheID',array('property1'=>'value1',...))
{
    // ... display the content to be cached here
   $this->endCache();
}

公共方法

方法 描述 定义在
__call() 如果类中没有调的方法名，则调用这个方法。 CComponent
__get() 返回一个属性值、一个事件处理程序列表或一个行为名称。 CComponent
__isset() 检查一个属性是否为null。 CComponent
__set() 设置一个组件的属性值。 CComponent
__unset() 设置一个组件的属性为null。 CComponent
asa() 返回这个名字的行为对象。 CComponent
attachBehavior() 附加一个行为到组件。 CComponent
attachBehaviors() 附加一个行为列表到组件。 CComponent
attachEventHandler() 为事件附加一个事件处理程序。 CComponent
beginCache() Begins fragment caching. CBaseController
beginClip() Begins recording a clip. CBaseController
beginContent() Begins the rendering of content that is to be decorated by the specified view. CBaseController
beginWidget() Creates a widget and executes it. CBaseController
canGetProperty() 确定属性是否可读。 CComponent
canSetProperty() 确定属性是否可写。 CComponent
createWidget() Creates a widget and initializes it. CBaseController
detachBehavior() 从组件中分离一个行为。 CComponent
detachBehaviors() 从组件中分离所有行为。 CComponent
detachEventHandler() 分离一个存在的事件处理程序。 CComponent
disableBehavior() 禁用一个附加行为。 CComponent
disableBehaviors() 禁用组件附加的所有行为。 CComponent
enableBehavior() 启用一个附加行为。 CComponent
enableBehaviors() 启用组件附加的所有行为。 CComponent
endCache() Ends fragment caching. CBaseController
endClip() Ends recording a clip. CBaseController
endContent() Ends the rendering of content. CBaseController
endWidget() Ends the execution of the named widget. CBaseController
evaLuateExpression() 计算一个PHP表达式，或根据组件上下文执行回调。 CComponent
getEventHandlers() 返回一个事件的附加处理程序列表。 CComponent
getViewFile() Returns the view script file according to the specified view name. CBaseController
hasEvent() 确定一个事件是否定义。 CComponent
hasEventHandler() 检查事件是否有附加的处理程序。 CComponent
hasProperty() 确定属性是否被定义。 CComponent
raiseEvent() 发起一个事件。 CComponent
renderFile() Renders a view file. CBaseController
renderInternal() Renders a view file. CBaseController
widget() Creates a widget and executes it. CBaseController

方法详细

beginCache() 方法
public boolean beginCache(string $id, array $properties=array ( ))
$id string a unique ID identifying the fragment to be cached.
$properties array initial property values for COutputCache.
{return} boolean whether we need to generate content for caching. False if cached version is available. 

public function beginCache($id,$properties=array())
{
    $properties['id']=$id;
    $cache=$this->beginWidget('COutputCache',$properties);
    if($cache->getIsContentCached())
    {
        $this->endCache();
        return false;
    }
    else
        return true;
}

Begins fragment caching. This method will display cached content if it is availabe. If not, it will start caching and would expect a endCache() call to end the cache and save the content into cache. A typical usage of fragment caching is as follows, 

if($this->beginCache($id))
{
    // ...generate content here
    $this->endCache();
}

参见

  • endCache
beginClip() 方法
public void beginClip(string $id, array $properties=array ( ))
$id string the clip ID.
$properties array initial property values for CClipWidget. 

public function beginClip($id,$properties=array())
{
    $properties['id']=$id;
    $this->beginWidget('CClipWidget',$properties);
}

Begins recording a clip. This method is a shortcut to beginning CClipWidget.

beginContent() 方法
public void beginContent(mixed $view=NULL, array $data=array ( ))
$view mixed the name of the view that will be used to decorate the content. The actual view script is resolved via getViewFile. If this parameter is null (default), the default layout will be used as the decorative view. Note that if the current controller does not belong to any module, the default layout refers to the application's default layout; If the controller belongs to a module, the default layout refers to the module's default layout.
$data array the variables (name=>value) to be extracted and made available in the decorative view. 

public function beginContent($view=null,$data=array())
{
    $this->beginWidget('CContentDecorator',array('view'=>$view, 'data'=>$data));
}

Begins the rendering of content that is to be decorated by the specified view.

参见

  • endContent
  • CContentDecorator
beginWidget() 方法
public CWidget beginWidget(string $className, array $properties=array ( ))
$className string the widget class name or class in dot syntax (e.g. application.widgets.MyWidget)
$properties array list of initial property values for the widget (Property Name => Property Value)
{return} CWidget the widget created to run 

public function beginWidget($className,$properties=array())
{
    $widget=$this->createWidget($className,$properties);
    $this->_widgetStack[]=$widget;
    return $widget;
}

Creates a widget and executes it. This method is similar to widget() except that it is expecting a endWidget() call to end the execution.

参见

  • endWidget
createWidget() 方法
public CWidget createWidget(string $className, array $properties=array ( ))
$className string class name (can be in path alias format)
$properties array initial property values
{return} CWidget the fully initialized widget instance. 

public function createWidget($className,$properties=array())
{
    $widget=Yii::app()->getWidgetFactory()->createWidget($this,$className,$properties);
    $widget->init();
    return $widget;
}

Creates a widget and initializes it. This method first creates the specified widget instance. It then configures the widget's properties with the given initial values. At the end it calls CWidget::init to initialize the widget. Starting from version 1.1, if a widget factory is enabled, this method will use the factory to create the widget, instead.

endCache() 方法
public void endCache()

public function endCache()
{
    $this->endWidget('COutputCache');
}

Ends fragment caching. This is an alias to endWidget.

参见

  • beginCache
endClip() 方法
public void endClip()

public function endClip()
{
    $this->endWidget('CClipWidget');
}

Ends recording a clip. This method is an alias to endWidget.

endContent() 方法
public void endContent()

public function endContent()
{
    $this->endWidget('CContentDecorator');
}

Ends the rendering of content.

参见

  • beginContent
endWidget() 方法
public CWidget endWidget(string $id='')
$id string optional tag identifying the method call for debugging purpose.
{return} CWidget the widget just ended running 

public function endWidget($id='')
{
    if(($widget=array_pop($this->_widgetStack))!==null)
    {
        $widget->run();
        return $widget;
    }
    else
        throw new CException(Yii::t('yii','{controller} has an extra endWidget({id}) call in its view.',
            array('{controller}'=>get_class($this),'{id}'=>$id)));
}

Ends the execution of the named widget. This method is used together with beginWidget().

参见

  • beginWidget
getViewFile() 方法
abstract public string getViewFile(string $viewName)
$viewName string view name
{return} string the file path for the named view. False if the view cannot be found. 

abstract public function getViewFile($viewName);

Returns the view script file according to the specified view name. This method must be implemented by child classes.

renderFile() 方法
public string renderFile(string $viewFile, array $data=NULL, boolean $return=false)
$viewFile string view file path
$data array data to be extracted and made available to the view
$return boolean whether the rendering result should be returned instead of being echoed
{return} string the rendering result. Null if the rendering result is not required. 

public function renderFile($viewFile,$data=null,$return=false)
{
    $widgetCount=count($this->_widgetStack);
    if(($renderer=Yii::app()->getViewRenderer())!==null && $renderer->fileExtension==='.'.CFileHelper::getExtension($viewFile))
        $content=$renderer->renderFile($this,$viewFile,$data,$return);
    else
        $content=$this->renderInternal($viewFile,$data,$return);
    if(count($this->_widgetStack)===$widgetCount)
        return $content;
    else
    {
        $widget=end($this->_widgetStack);
        throw new CException(Yii::t('yii','{controller} contains improperly nested widget tags in its view "{view}". A {widget} widget does not have an endWidget() call.',
            array('{controller}'=>get_class($this), '{view}'=>$viewFile, '{widget}'=>get_class($widget))));
    }
}

Renders a view file.

renderInternal() 方法
public string renderInternal(string $_viewFile_, array $_data_=NULL, boolean $_return_=false)
$_viewFile_ string view file
$_data_ array data to be extracted and made available to the view file
$_return_ boolean whether the rendering result should be returned as a string
{return} string the rendering result. Null if the rendering result is not required. 

public function renderInternal($_viewFile_,$_data_=null,$_return_=false)
{
    // we use special variable names here to avoid conflict when extracting data
    if(is_array($_data_))
        extract($_data_,EXTR_PREFIX_SAME,'data');
    else
        $data=$_data_;
    if($_return_)
    {
        ob_start();
        ob_implicit_flush(false);
        require($_viewFile_);
        return ob_get_clean();
    }
    else
        require($_viewFile_);
}

Renders a view file. This method includes the view file as a PHP script and captures the display result if required.

widget() 方法
public mixed widget(string $className, array $properties=array ( ), boolean $captureOutput=false)
$className string the widget class name or class in dot syntax (e.g. application.widgets.MyWidget)
$properties array list of initial property values for the widget (Property Name => Property Value)
$captureOutput boolean whether to capture the output of the widget. If true, the method will capture and return the output generated by the widget. If false, the output will be directly sent for display and the widget object will be returned. This parameter is available since version 1.1.2.
{return} mixed the widget instance when $captureOutput is false, or the widget output when $captureOutput is true. 

public function widget($className,$properties=array(),$captureOutput=false)
{
    if($captureOutput)
    {
        ob_start();
        ob_implicit_flush(false);
        $widget=$this->createWidget($className,$properties);
        $widget->run();
        return ob_get_clean();
    }
    else
    {
        $widget=$this->createWidget($className,$properties);
        $widget->run();
        return $widget;
    }
}

Creates a widget and executes it.

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