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2014/10/15 ¤U¤È 10:15:14

iphone Programming Glossary: uibackgroundtaskinvalid

Getting user location every n minutes after app goes to background

http://stackoverflow.com/questions/10235203/getting-user-location-every-n-minutes-after-app-goes-to-background

sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT.. sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT.. sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. self initTimer dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT..

Installing a configuration profile on iPhone - programmatically

http://stackoverflow.com/questions/2338035/installing-a-configuration-profile-on-iphone-programmatically

bgTask Appdelegate.m void applicationDidEnterBackground UIApplication application NSAssert self bgTask UIBackgroundTaskInvalid nil bgTask application beginBackgroundTaskWithExpirationHandler ^ dispatch_async dispatch_get_main_queue ^ application endBackgroundTask.. ^ dispatch_async dispatch_get_main_queue ^ application endBackgroundTask self bgTask self bgTask UIBackgroundTaskInvalid 5 In your controller call safari with the name of the mobileconfig stored in Documents UIApplication sharedApplication..

iphone: playing audio playlist in the background?

http://stackoverflow.com/questions/3297571/iphone-playing-audio-playlist-in-the-background

ap ap release if mainController.audioPlayer nil NSLog error description else UIBackgroundTaskIdentifier newTaskId UIBackgroundTaskInvalid mainController.audioPlayer prepareToPlay if mainController.audioPlayer play newTaskId UIApplication sharedApplication beginBackgroundTaskWithExpirationHandler.. play newTaskId UIApplication sharedApplication beginBackgroundTaskWithExpirationHandler NULL if newTaskId UIBackgroundTaskInvalid bgTaskId UIBackgroundTaskInvalid UIApplication sharedApplication endBackgroundTask bgTaskId bgTaskId newTaskId void audioPlayerDidFinishPlaying.. sharedApplication beginBackgroundTaskWithExpirationHandler NULL if newTaskId UIBackgroundTaskInvalid bgTaskId UIBackgroundTaskInvalid UIApplication sharedApplication endBackgroundTask bgTaskId bgTaskId newTaskId void audioPlayerDidFinishPlaying AVAudioPlayer..

iPhone - Backgrounding to poll for events

http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events

sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT.. the expirationHandler so your App runs until the system terminates our process app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Be very spare with CPU Time here and your app runs longer But one thing is for sure your app will be terminated after a.. sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ while 1 NSLog..

How do I get my AVPlayer to play while app is in background?

http://stackoverflow.com/questions/4771105/how-do-i-get-my-avplayer-to-play-while-app-is-in-background

it is not needed newTaskId UIApplication sharedApplication beginBackgroundTaskWithExpirationHandler NULL if newTaskId UIBackgroundTaskInvalid bgTaskId UIBackgroundTaskInvalid UIApplication sharedApplication endBackgroundTask bgTaskId bgTaskId newTaskId Right now.. sharedApplication beginBackgroundTaskWithExpirationHandler NULL if newTaskId UIBackgroundTaskInvalid bgTaskId UIBackgroundTaskInvalid UIApplication sharedApplication endBackgroundTask bgTaskId bgTaskId newTaskId Right now I have no idea where I should go..

setKeepAliveTimeout and BackgroundTasks

http://stackoverflow.com/questions/4777499/setkeepalivetimeout-and-backgroundtasks

beginBackgroundTaskWithExpirationHandler ^ NSLog @ exipiration handler triggered app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid self cancel dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ NSMutableURLRequest anURLRequest.. 120.00 if exitError nil somethings goes wrong NSLog @ somethings goes wrong app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid self cancel return do some stuff with NSData and prompt the user with a UILocalNotification NSLog @ AlltasksCompleted.. NSData and prompt the user with a UILocalNotification NSLog @ AlltasksCompleted app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid self cancel The above code seems to work sometimes but many other it crashes my application with the following log information..

How to Maintain VOIP socket connection in background?

http://stackoverflow.com/questions/5987495/how-to-maintain-voip-socket-connection-in-background

beginBackgroundTaskWithExpirationHandler ^ UIApplication sharedApplication endBackgroundTask m_bgTask m_bgTask UIBackgroundTaskInvalid This is needed to make sure that application will not be suspended before sending the ping and waiting the reply on ping..