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2014/10/15 ¤U¤È 10:09:55
iphone Programming Glossary: gpsobserverWhy doesn't Remove Observer from NSNotificationCenter:addObserverForName:usingBlock get called http://stackoverflow.com/questions/8477629/why-doesnt-remove-observer-from-nsnotificationcenteraddobserverfornameusingbl is never removed in the following code. In my viewDidAppear I have the following void viewDidAppear BOOL animated id gpsObserver NSNotificationCenter defaultCenter addObserverForName FI_NOTES kNotificationsGPSUpdated object nil queue NSOperationQueue.. usingBlock ^ NSNotification note NSLog @ run once and only once NSNotificationCenter defaultCenter removeObserver gpsObserver The observer never gets removed and the statement is output every time the notification is sent out. Can anyone provide.. 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 using __block outside and this should work. __block..
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