UserNotificationCenter 通知回调 无法监听

export class MyNotificationDelegate implements UNUserNotificationCenterDelegate {  
    /**  
     * Constructor for MyNotificationDelegate class.  
     * Initializes the delegate and logs a message for debugging.  
     */  
    constructor() {  
        // 在这里可以做一些初始化工作  
        console.log("MyNotificationDelegate 实例已创建");  
    }  

    /**  
     * This method is called when a notification arrives while the app is running in the foreground.  
     * It ensures that alerts, sounds, and badges are still shown.  
     */  
    userNotificationCenter(  
        notification: UserNotifications.UNNotification    ): void {  
        // 打印收到的通知内容，方便调试  
        console.log("接收到通知，内容：", notification);  
        console.log("abcd");  

    }  
}