AppAsset.php

 * @since 2.0
 */
class AppAsset extends AssetBundle
{
    public $basePath = '@webroot';
    public $baseUrl = '@web';
    public $css = [
        'css/main.css'
    ];
    public $js = [
    ];
    public $depends = [
        'yii\web\YiiAsset',
        'yii\bootstrap\BootstrapAsset',
    ];
    //定义按需加载JS方法，注意加载顺序在最后  
    public static function addScript($view, $jsfile) {  
        $view->registerJsFile($jsfile, [AppAsset::className(), 'depends' => 'api\assets\AppAsset']);  
    }  
      
   //定义按需加载css方法，注意加载顺序在最后  
    public static function addCss($view, $cssfile) {  
        $view->registerCssFile($cssfile, [AppAsset::className(), 'depends' => 'api\assets\AppAsset']);  
    } 
}

view文件：index.php

registerCssFile('@web/css/home/index.css');
$this->title = 'CodeNote';
?>
...

运行后出现错误
ReflectionException
Class apiassetsAppAsset does not exist
删除AppAsset::addCss($this,'@web/css/home/index.css'); 就不会错，为什么？