iOS Programming: The Big Nerd Ranch Guide

Adding a Local Notification

Now you are going to implement the reminder feature using a local notification. A local notification is a way for an application to alert the user even when the application is not currently running.

(An application can also use push notifications that are implemented using a backend server. For more about push notifications, read Apple’s Local and Push Notification Programming Guide.)

Getting a local notification to display is easy. You create a UILocalNotification and give it some text and a date. Then you schedule the notification with the shared application – the single instance of UIApplication.

Update the addReminder: method to do this:

-​ ​(​I​B​A​c​t​i​o​n​)​a​d​d​R​e​m​i​n​d​e​r​:​(​i​d​)​s​e​n​d​e​r​ ...