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2014/10/15 ¤U¤È 10:04:33

iphone Programming Glossary: beginbackgroundtaskwithexpirationhandler

iPhone - Backgrounding to poll for events

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

UIApplication application UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return.. @ ### VOIP backgrounding callback UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async.. NSLog @ VOIP backgrounding accepted UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async..

How do I get a background location update every n minutes in my iOS application?

http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application

seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as I understand this should be used to finish some work in the background also limited in time.. following Specify location background mode Use an NSTimer in the background by using UIApplication beginBackgroundTaskWithExpirationHandler In case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is..

iPhone - Backgrounding to poll for events

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

until iOS terminates your app. void applicationDidEnterBackground UIApplication application UIApplication app UIApplication 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.. this Handler will be called void backgroundHandler NSLog @ ### VOIP backgrounding callback UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT.. 600 handler ^ self backgroundHandler if backgroundAccepted NSLog @ VOIP backgrounding accepted UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT..

How do I get a background location update every n minutes in my iOS application?

http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application

the app via the notification . This approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as I understand this should be used to finish some work in the background also limited in time when an app is moved to the background rather than implementing.. this with the help of the Apple Developer Forums. I did the following Specify location background mode Use an NSTimer in the background by using UIApplication beginBackgroundTaskWithExpirationHandler In case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location manager should be enabled and disabled..

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

applicationDidEnterBackground UIApplication application UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async.. coordinate .latitude newLocation coordinate .longitude UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async.. NSError error self.locationManager stopUpdatingLocation UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. self initTimer..

iOS: Keep an app running like a service

http://stackoverflow.com/questions/11044095/ios-keep-an-app-running-like-a-service

1 An app cannot execute in the background unless a it requests extra time from the OS to do so. This is done using beginBackgroundTaskWithExpirationHandler. It is not specified intentionally by Apple how long this extra time is however in practice it is around 10 minutes. b an..

iphone: playing audio playlist in the background?

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

mainController.audioPlayer prepareToPlay if mainController.audioPlayer play newTaskId UIApplication sharedApplication beginBackgroundTaskWithExpirationHandler NULL if newTaskId UIBackgroundTaskInvalid bgTaskId UIBackgroundTaskInvalid UIApplication sharedApplication endBackgroundTask..

applicationWillEnterForeground vs. applicationDidBecomeActive, applicationWillResignActive vs. applicationDidEnterBackground

http://stackoverflow.com/questions/3712979/applicationwillenterforeground-vs-applicationdidbecomeactive-applicationwillre

iphone - Connecting to server in background

http://stackoverflow.com/questions/4594348/iphone-connecting-to-server-in-background

it self to wake up and re connect to the internet. However according to the article above from Apple you can call this beginBackgroundTaskWithExpirationHandler method from your app's delegate to apply for additional time when put in the background which is to say though your app..

iPhone - Backgrounding to poll for events

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

applicationDidEnterBackground UIApplication application UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async.. backgroundHandler NSLog @ ### VOIP backgrounding callback UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue.. backgroundAccepted NSLog @ VOIP backgrounding accepted UIApplication app UIApplication sharedApplication bgTask app beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue..

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

this but not added yet cuase some stuff I've read says it is not needed newTaskId UIApplication sharedApplication beginBackgroundTaskWithExpirationHandler NULL if newTaskId UIBackgroundTaskInvalid bgTaskId UIBackgroundTaskInvalid UIApplication sharedApplication endBackgroundTask..

How to Maintain VOIP socket connection in background?

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

pingTimeout PingTimerCallback result is ignored And StartLongBGTask is a m_bgTask UIApplication sharedApplication beginBackgroundTaskWithExpirationHandler ^ UIApplication sharedApplication endBackgroundTask m_bgTask m_bgTask UIBackgroundTaskInvalid This is needed to make sure..

How do I get a background location update every n minutes in my iOS application?

http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application

approach also doesn't seem to be a clean approach as this is not what notifications should be used for. UIApplication beginBackgroundTaskWithExpirationHandler As far as I understand this should be used to finish some work in the background also limited in time when an app is moved.. Forums. I did the following Specify location background mode Use an NSTimer in the background by using UIApplication beginBackgroundTaskWithExpirationHandler In case n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location..

When an iOS application goes to the background, are lengthy tasks paused?

http://stackoverflow.com/questions/6650717/when-an-ios-application-goes-to-the-background-are-lengthy-tasks-paused

time runs out your application is killed and purged from memory. If you still need more time to perform tasks call the beginBackgroundTaskWithExpirationHandler method to request background execution time and then start any long running tasks in a secondary thread. Regardless of whether..

Does AFNetworking have backgrounding support?

http://stackoverflow.com/questions/7800614/does-afnetworking-have-backgrounding-support

UIApplication application __block UIBackgroundTaskIdentifier backgroundTaskIdentifier application beginBackgroundTaskWithExpirationHandler ^ void application endBackgroundTask backgroundTaskIdentifier YourRestClient sharedClient cancelAllHTTPOperations Or if..