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2014/10/15 ¤U¤È 10:06:38
iphone Programming Glossary: didchangevalueforkeyHow do I do an Asychronous NSURLConnection inside an NSOperation? http://stackoverflow.com/questions/1304508/how-do-i-do-an-asychronous-nsurlconnection-inside-an-nsoperation @ http google.com NSThread detachNewThreadSelector @selector downloadAndParse toTarget self withObject url self didChangeValueForKey @ isExecuting else If it's already been cancelled mark the operation as finished. self willChangeValueForKey @ isFinished.. it's already been cancelled mark the operation as finished. self willChangeValueForKey @ isFinished finished YES self didChangeValueForKey @ isFinished BOOL isConcurrent return YES BOOL isExecuting return executing BOOL isFinished return finished void downloadAndParse.. nil downloadAndParsePool release NSLog @ download and parse cleaning up self.downloadAndParsePool nil self didChangeValueForKey @ isExecuting self didChangeValueForKey @ isFinished #pragma mark NSURLConnection Delegate methods Disable caching so that..
Core data images from desktop to iphone http://stackoverflow.com/questions/2271195/core-data-images-from-desktop-to-iphone data UIImagePNGRepresentation image myManagedObject setImage data self setPrimitiveValue data forKey @ image self didChangeValueForKey @ image UIImage image self willAccessValueForKey @ image UIImage image UIImage imageWithData self primitiveValueForKey @.. NSPNGFileType properties nil myManagedObject setImage data self setPrimitiveValue data forKey @ image self didChangeValueForKey @ image NSImage image self willAccessValueForKey @ image NSImage image NSImage alloc initWithData self primitiveValueForKey..
Subclassing NSOperation to be concurrent and cancellable http://stackoverflow.com/questions/3859631/subclassing-nsoperation-to-be-concurrent-and-cancellable @selector start withObject nil waitUntilDone NO return self willChangeValueForKey @ isExecuting _isExecuting YES self didChangeValueForKey @ isExecuting if _isCancelled YES NSLog @ OPERATION CANCELED else NSLog @ Operation started. sleep 1 self finish void.. self willChangeValueForKey @ isExecuting self willChangeValueForKey @ isFinished _isExecuting NO _isFinished YES self didChangeValueForKey @ isExecuting self didChangeValueForKey @ isFinished if _isCancelled YES NSLog @ OPERATION CANCELED In the example I found.. self willChangeValueForKey @ isFinished _isExecuting NO _isFinished YES self didChangeValueForKey @ isExecuting self didChangeValueForKey @ isFinished if _isCancelled YES NSLog @ OPERATION CANCELED In the example I found I don't understand why performSelectorOnMainThread..
An -observeValueForKeyPath:ofObject:change:context: message was received but not handled http://stackoverflow.com/questions/4120539/an-observevalueforkeypathofobjectchangecontext-message-was-received-but-not 216 6 Foundation 0x349b6775 NSKeyValueDidChange 236 7 Foundation 0x349ae489 NSObject NSKeyValueObserverNotification didChangeValueForKey 76 8 CoreData 0x3165b577 _PF_ManagedObject_DidChangeValueForKeyIndex 102 9 CoreData 0x3165ac51 _sharedIMPL_setvfk_core..
Xcode4: Different code generated for custom core data managed objects http://stackoverflow.com/questions/5253753/xcode4-different-code-generated-for-custom-core-data-managed-objects NSKeyValueUnionSetMutation usingObjects changedObjects self primitiveValueForKey @ children addObject value self didChangeValueForKey @ children withSetMutation NSKeyValueUnionSetMutation usingObjects changedObjects changedObjects release Can someone weigh..
Is it possible to observe a readonly property of an object in Cocoa Touch? http://stackoverflow.com/questions/549672/is-it-possible-to-observe-a-readonly-property-of-an-object-in-cocoa-touch changes the value of the instance variable backing that property directly without seding willChangeValueForKey and didChangeValueForKey notifications then observers will not automatically be notified by the KVO system. If you can verify that the value of this..
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