2014/10/15 下午 10:04:30

iphone Programming Glossary: backgroundtask

iOS KeyChain not retrieving values from background

http://stackoverflow.com/questions/10536859/ios-keychain-not-retrieving-values-from-background

is an issue I would like to fix and not worry about. Thanks in advance. Also all of my background work is set up in a backgroundTask to prevent things from timing out. I'm not having any issues with the work surrounding the keychain but I don't let things..

Invoke get current coordinates every few seconds without NSTimer

http://stackoverflow.com/questions/12841017/invoke-get-current-coordinates-every-few-seconds-without-nstimer

don't know where to set time if I do anything right here void applicationDidEnterBackground UIApplication application backgroundTask application beginBackgroundTaskWithExpirationHandler ^ dispatch_async dispatch_get_main_queue ^ if backgroundTask UIBackgroundTaskInvalid.. backgroundTask application beginBackgroundTaskWithExpirationHandler ^ dispatch_async dispatch_get_main_queue ^ if backgroundTask UIBackgroundTaskInvalid application endBackgroundTask backgroundTask backgroundTask UIBackgroundTaskInvalid dispatch_async.. ^ dispatch_async dispatch_get_main_queue ^ if backgroundTask UIBackgroundTaskInvalid application endBackgroundTask backgroundTask backgroundTask UIBackgroundTaskInvalid dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ _pendingLocationsTimer..