iphone XMPP App run background

by

You can indeed run a XMPP Framework-based app in the background in iOS4 by calling it a VoIP app. (However, Apple will reject it from the App Store unless it also truly does VoIP).

You need to set the VoIP flag in your app’s (appname)-info.plist file, and then in

(void)xmppStream:(XMPPStream *)sender socketWillConnect:(AsyncSocket *)socket

You’ll need to set the socket stream flags to include kCFStreamNetworkServiceTypeVoIP:

 CFReadStreamSetProperty([socket getCFReadStream], kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);
 CFWriteStreamSetProperty([socket getCFWriteStream], kCFStreamNetworkServiceType, kCFStreamNetworkServiceTypeVoIP);

Then, your app will be woken up briefly when a new XMPP message arrives. In your normal 

(void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message

handler, you would want to create a local notification for the message if you are backgrounded (you can keep track of background state via UIApplicationDidEnterBackgroundNotification and UIApplicationWillEnterForegroundNotification). The local notification handler can set the application badge number, etc (just like you would for a push notification).

EDIT

Newer versions of the XMPP Framework (specifically, GCDAsyncSocket) now support a call to make this easier, so you can just have:

- (void)xmppStream:(XMPPStream *)sender socketWillConnect:(GCDAsyncSocket *)socket
{
    // Tell the socket to stay around if the app goes to the background (only works on apps with the VoIP background flag set)
    [socket performBlock:^{
            [socket enableBackgroundingOnSocket];
    }];
}

More Related Contents:

  1. How to "undo" when we draw in iPhone SDK? [closed]
  2. How can we programmatically detect which iOS version is device running on? [duplicate]
  3. How to load a UIView using a nib file created with Interface Builder
  4. How can I animate the movement of a view or image along a curved path?
  5. How do I draw a shadow under a UIView?
  6. What are best practices that you use when writing Objective-C and Cocoa? [closed]
  7. iCloud basics and code sample [closed]
  8. When should I release objects in -(void)viewDidUnload rather than in -dealloc?
  9. Dismissing a Presented View Controller
  10. Determining if an iPhone is Jail broken Programmatically
  11. How can I customize an iOS alert view?
  12. iOS devices as web server [closed]
  13. Removing a view controller from UIPageViewController
  14. iOS: Using device modifiers for loading xib files?
  15. Enabling crash logs symbolication in Xcode 4.2
  16. iOS Pinch Scale and Two Finger Rotate at same time
  17. Sorting NSString values as if NSInteger using NSSortDescriptor
  18. NSString to NSArray
  19. How do I auto size a UIScrollView to fit its content
  20. Annotation details after detail disclosure pressed?
  21. subclassing UIWindow while using storyboards
  22. Access App Identifier Prefix programmatically
  23. How to create subscript characters that’s not in Unicode in iOS
  24. Blocks instead of performSelector:withObject:afterDelay: [duplicate]
  25. UIBarButtonItem: target-action not working?
  26. Difference between two NSDate objects — Result also a NSDate
  27. Retrieving current local time on iPhone?
  28. How to use pList in iOS Programming
  29. How to automatically size UIScrollView to fit the content
  30. How to animate application icon in iOS?

Leave a Comment