March 2013
Intermediate to advanced
1000 pages
34h 51m
English
Content preview from Programming iOS 6, 3rd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Push Notifications
If your app uses a server on the network that’s under your control, you can arrange for the user to be notified when a significant event takes place on the server. This is called a push notification (or remote notification). The user interface for a push notification is the same as for a local notification, and the user can disable your app’s notifications altogether (Chapter 26).
For example, the TidBITS News app is about news stories on the TidBITS website. The app’s data comes from an RSS feed, which is refreshed on the server side whenever something changes on the site, such as a new news story being posted. It might be appropriate (and cool) if we were to add push notifications to the server code that refreshes the RSS feed, so that users could be alerted to the fact that they might like to launch TidBITS News and read a newly posted story.
Implementing push notifications is not trivial, and requires cooperation across the network between your app and your server, and between your server and Apple’s push notification server. I’ve never actually tried this, so I’m just describing what the architecture is like; for details, read Apple’s Local and Push Notification Programming Guide.
When developing your app, you obtain from the iOS Provisioning Portal (Chapter 9) credentials identifying your app, and allowing communication between your server and Apple’s push notification server, and between Apple’s push notification server and your app running on the user’s device. ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.