如何在Yii 2中访问AR对象作为组件？

Actually, I want have access to some AR object in anywere. So I want access to this ojb as yii component.

Like as Yii using this for user: Yii::$app->user->identity - User component contains User AR object.

I want store my Page AR in component. So, it's look like something: Yii::$app->page->page - Page AR is a propery of Page component. Not very nice :(. This is the only way?

In config you can set it. Like user is set and adapt it to your requirements.

$config = [
    ...
    'components'=>[
        ....
        'user' => [
            'class'=>'yii\web\User',
            'identityClass' => 'common\models\User',
            ...
        ],
        ...
    ],
...
];

Read more in yii2 documentation on this link