gii生成crud后访问出现的问题

crud生成后访问出错： Unknown Class – yii\base\UnknownClassException

第一种解决方法：修改属性yii\base\Application::controllerNamespace  ，在frontend/main.php中修改该属性为'app\controllers'

第二种解决方法：Unable to find 'frontend\controllers\PostController' in file: /var/www/advanced/frontend/controllers/PostController.php. Namespace missing? 将PostController.php中namespace app\controllers;改为namespace frontend\controllers;

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