我有一个wordpress插件类示例。我在勾搭woocommercewoocommerce_saved_order_items 我想创建一个管理通知。添加来自\\uu construct的操作有效，但当我想在钩子函数中创建通知时，它不会出现，问题在哪里？

 class SomeClass {

        private static $instance;


        public function __construct() {
            add_action(\'woocommerce_saved_order_items\',array($this,\'orderStatusChange\'),10,1);
            add_action(\'admin_notices\', array($this,\'simple_notice\')); // This works
        }

        public static function getInstance() {
            if(!self::$instance)
                self::$instance = new SomeClass();

            return self::$instance;
        }


        public function orderStatusChange($orderID){
            add_action(\'admin_notices\', \'simple_notice\');//This not works
        }



        function simple_notice(){
            ?>
            <div class="updated notice is-dismissible">
                <p>Thank you for using this plugin! <strong>You are awesome</strong>.</p>
            </div>
            <?php
        }

    }


    SomeClass::getInstance();