Customize notifications buttons

I’m trying to build an ionic2 application which send notifications when my ibeacon is detected,the app is sending me many instance of the samenotifiction at the same time.
i want to customize my notification so when i click the ok button the notifications stop
there is my code:

public schedule(title, text) {
            at: new Date(new Date().getTime() + 1* 1000)    

LocalNotifications.on("click", (notification, state) => {

            let alert = this.alertCtrl.create({

                title: this.todos[1].info.nom_du_musee,
                subTitle: this.todos[1].info.periode_ouverture+" "+this.todos[1].info.adr+"  site web  "+this.todos[1].info.sitweb,
                buttons: ["OK"]


How can i add actions to my button ok?