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2014/10/15 ¤U¤È 10:03:30
iphone Programming Glossary: addobserverfornameHow can I programmatically detect EDGE network or bad network in iPhone? http://stackoverflow.com/questions/19999601/how-can-i-programmatically-detect-edge-network-or-bad-network-in-iphone @ Current Radio Access Technology @ telephonyInfo.currentRadioAccessTechnology NSNotificationCenter.defaultCenter addObserverForName CTRadioAccessTechnologyDidChangeNotification object nil queue nil usingBlock ^ NSNotification note NSLog @ New Radio..
Storyboards orientation support for xCode 4.2? http://stackoverflow.com/questions/7803524/storyboards-orientation-support-for-xcode-4-2 beginGeneratingDeviceOrientationNotifications 2.Look for notifications NSNotificationCenter defaultCenter addObserverForName UIDeviceOrientationDidChangeNotification object nil queue nil usingBlock ^ NSNotification note We must add a delay here..
Why doesn't Remove Observer from NSNotificationCenter:addObserverForName:usingBlock get called http://stackoverflow.com/questions/8477629/why-doesnt-remove-observer-from-nsnotificationcenteraddobserverfornameusingbl doesn't Remove Observer from NSNotificationCenter addObserverForName usingBlock get called I'm confused on why the observer is never removed in the following code. In my viewDidAppear I have.. viewDidAppear I have the following void viewDidAppear BOOL animated id gpsObserver NSNotificationCenter defaultCenter addObserverForName FI_NOTES kNotificationsGPSUpdated object nil queue NSOperationQueue mainQueue usingBlock ^ NSNotification note NSLog.. blocks nsnotifications nsnotificationcenter share improve this question When the block is pushed onto the stack by addObserverForName the method has not yet returned so gpsObserver is nil under ARC or garbage undefined not under ARC . Declare the variable..
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