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2014/10/15 ¤U¤È 10:06:59

iphone Programming Glossary: dispatch_get_global_queue

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

bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ Do the work associated with the task. self.timer nil self initTimer initTimer void.. bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ Do the work associated with the task. self initTimer void locationManager CLLocationManager.. bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. self initTimer dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ Do the work associated with the task. I am also invalidating the timer void checkUpdates..

Iphone Application:-My Application Crash

http://stackoverflow.com/questions/13969820/iphone-application-my-application-crash

iphone ios running in separate thread

http://stackoverflow.com/questions/3869217/iphone-ios-running-in-separate-thread

thread and then do something with the results in the main run loop is incredibly easy and compact dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ Add code here to do background processing dispatch_async dispatch_get_main_queue ^..

beginBackgroundTaskWithExpirationHandler

http://stackoverflow.com/questions/3871149/beginbackgroundtaskwithexpirationhandler

beginBackgroundTaskWithExpirationHandler ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid iphone cocoa touch share..

Saving UIView contents in iOS 4 with real size of the images inside (i.e. scale contentes up for save)

http://stackoverflow.com/questions/4213529/saving-uiview-contents-in-ios-4-with-real-size-of-the-images-inside-i-e-scale

iPhone - Backgrounding to poll for events

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

bgTask bgTask UIBackgroundTaskInvalid Start the long running task and return immediately. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ you can do sth. here or simply do nothing All your background treads and timers are.. ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ while 1 NSLog @ BGTime left f UIApplication sharedApplication .backgroundTimeRemaining.. ^ app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid Start the long running task dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ while 1 NSLog @ BGTime left f UIApplication sharedApplication .backgroundTimeRemaining..

setKeepAliveTimeout and BackgroundTasks

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

exipiration handler triggered app endBackgroundTask bgTask bgTask UIBackgroundTaskInvalid self cancel dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ NSMutableURLRequest anURLRequest NSURLResponse outResponse NSError exitError NSString..

NSURLConnection and grand central dispatch

http://stackoverflow.com/questions/5037545/nsurlconnection-and-grand-central-dispatch

use asynchronous API with RunLoop. AsyncURLConnection request url completeBlock ^ NSData data success dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ process downloaded data in Concurrent Queue dispatch_async dispatch_get_main_queue ^..

How to make ui responsive all the time and do background updating?

http://stackoverflow.com/questions/5133731/how-to-make-ui-responsive-all-the-time-and-do-background-updating

is thread safe. dispatch_queue_t mainQueue dispatch_get_main_queue dispatch_queue_t concurrentQueue dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 dispatch_async concurrentQueue ^ dispatch_apply thumbnails count concurrentQueue ^ size_t..

Can you use cancel/isCancelled with GCD/dispatch_async?

http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async

user has clicked button to build new spaceship pleaseAbandonYourEfforts FALSE dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_HIGH 0 ^ self actuallyProcedurallyBuildInBackground as an aside it's worth noting that this does..

iPhone:Programmatically compressing recorded video to share?

http://stackoverflow.com/questions/5687341/iphoneprogrammatically-compressing-recorded-video-to-share

dismissModalViewControllerAnimated YES void copyTempVideoToMediaLibrary NSString videoURL dispatch_queue_t mainQueue dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 dispatch_async mainQueue ^ ALAssetsLibrary library ALAssetsLibrary alloc init autorelease..

loading images from a background thread using blocks

http://stackoverflow.com/questions/7502073/loading-images-from-a-background-thread-using-blocks

image in the background and as soon as its loaded the corresponding cell is updated on the mainThread. dispatch_async dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_BACKGROUND 0 ^ void NSData data0 NSData dataWithContentsOfURL someURL UIImage image UIImage imageWithData..

Load image to a tableView from URL iphone sdk

http://stackoverflow.com/questions/7565123/load-image-to-a-tableview-from-url-iphone-sdk

You can use GCD to load images in background thread like this get a dispatch queue dispatch_queue_t concurrentQueue dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 this will start the image loading in bg dispatch_async concurrentQueue ^ NSData image..

Last In-First Out Stack with GCD?

http://stackoverflow.com/questions/7567827/last-in-first-out-stack-with-gcd

imageView setImage placeHolderImage Retrieve the image from the database on a background queue dispatch_queue_t queue dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_HIGH 0 dispatch_async queue ^ UIImage image render image contact.image image use an index path.. as we get onto the main queue so as not to block the main queue and therefore the UI dispatch_queue_t lowPriorityQueue dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_BACKGROUND 0 dispatch_apply contactsCount lowPriorityQueue ^ size_t idx skip the first 25 because..