public function behaviors()
{
    return [
        ‘access‘ => [
            ‘class‘ => \yii\filters\AccessControl::className(),
            ‘only‘ => [‘create‘, ‘update‘],
            ‘rules‘ => [
                // deny all POST requests
                [
                    ‘allow‘ => false,
                    ‘verbs‘ => [‘POST‘]
                ],
                // allow authenticated users
                [
                    ‘allow‘ => true,
                    ‘roles‘ => [‘@‘],
                ],
                // everything else is denied
            ],
            ‘denyCallback‘  => function ($rule, $action) {
                Yii::$app->session->setFlash(‘error‘, ‘This section is only for registered users.‘);
                Yii::$app->user->loginRequired();
            },
        ],
    ];
}

如上代码，当用户没登录的时候，将会跳转到site/login，现在的问题是想要不跳转，而是显示信息‘你没有访问的权限’，那么代码设置如下：

 public function behaviors()
    {
        return [
            ‘access‘ => [
                ‘class‘ => \yii\web\AccessControl::className(),
                ‘only‘ => [‘login‘, ‘logout‘, ‘signup‘],
                ‘rules‘ => [
                    [
                        ‘actions‘ => [‘login‘, ‘signup‘],
                        ‘allow‘ => true,
                        ‘roles‘ => [‘?‘],
                    ],
                    [
                        ‘actions‘ => [‘logout‘],
                        ‘allow‘ => true,
                        ‘roles‘ => [‘@‘],
                    ],
                ],
            ],
        ];
    }

让所有来宾（尚未验证）的用户访问“登录”和“注册”的行动。
允许通过验证的用户才能访问‘注销‘的行动。