There are times when you want to notify the user that an important event has occurred or will occur.
Push notifications are a great way to notify the user that an event has occurred and became a staple feature immediately after they were added into the iOS sdk.
Now local notifications are available that allow you to push a notification to the device that your app is running on based on time, the notifications can even be recurring.
Brandon Treb has written a great step-by-step tutorial on exactly how to do just that, which you can find here:
iPhone Programming Tutorial Notifications
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