2014/10/15 下午 10:10:34

iphone Programming Glossary: invalidating

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

dispatch_get_global_queue DISPATCH_QUEUE_PRIORITY_DEFAULT 0 ^ Do the work associated with the task. I am also invalidating the timer void checkUpdates NSTimer timer UIApplication app UIApplication sharedApplication double remaining app.backgroundTimeRemaining..

what is the first step in (NSTimer release and invalidate)?

http://stackoverflow.com/questions/1171393/what-is-the-first-step-in-nstimer-release-and-invalidate

a repeating timer when appropriate within that method. In many situations however you also want the option of invalidating the timer 䕑erhaps even before it starts. In this case you do need to keep a reference to the timer so that you can send..

NSTimer problem

http://stackoverflow.com/questions/3220695/nstimer-problem

not the case you could modify the handleTimerTick method so that it takes an NSTimer as an argument and use this for invalidating the timer once it has expired. @interface MyController UIViewController UILabel theLabel @private NSTimer countdownTimer..

Alternative solutions for in-house iPhone enterprise app distribution

http://stackoverflow.com/questions/3309835/alternative-solutions-for-in-house-iphone-enterprise-app-distribution

to restart the app. This gives your client the flexibility to change their internal network configuration without invalidating your application code. You could also make this information manually configurable within the application but then you incur..

How to check if NSTimer has been already invalidated

http://stackoverflow.com/questions/368253/how-to-check-if-nstimer-has-been-already-invalidated

that method on nil instead which does nothing. Alternatively you can use NSTimer isValid to check if it's valid before invalidating but there's really no reason to hold onto your reference after invalidating it the first time anyway. Also if your real.. isValid to check if it's valid before invalidating but there's really no reason to hold onto your reference after invalidating it the first time anyway. Also if your real problem is that you haven't retained your reference and so the first invalidate..

Mysterious “progressive slowing” problem in run loop / drawRect

http://stackoverflow.com/questions/4786754/mysterious-progressive-slowing-problem-in-run-loop-drawrect

in time for each display. I see two solutions Clip the new rendering into a particular in the PaintView. Instead of invalidating the complete view invalidate only the the CGRect that really needs repainting. This as I understand it is the solution proposed..

What causes a journal file to be created in SQLite?

http://stackoverflow.com/questions/633274/what-causes-a-journal-file-to-be-created-in-sqlite

MEMORY OFF Write operations are normally not completed until you COMMIT which is implemented by truncating deleting or invalidating the journal. If this behavior is new I have no explanation for why it might have changed other than perhaps an upgrade of..

How to populate UITableView with the responce of JSON from a different ViewController?

http://stackoverflow.com/questions/8969135/how-to-populate-uitableview-with-the-responce-of-json-from-a-different-viewcontr

void splitViewController UISplitViewController splitController willShowViewController UIViewController viewController invalidatingBarButtonItem UIBarButtonItem barButtonItem Called when the view is shown again in the split view invalidating the button.. invalidatingBarButtonItem UIBarButtonItem barButtonItem Called when the view is shown again in the split view invalidating the button and popover controller. self.navigationItem setLeftBarButtonItem nil animated YES self.masterPopoverController..