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2014/10/15 ¤U¤È 10:13:17
iphone Programming Glossary: removeobserverHow to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk similar method remove yourself as an observer void viewWillDisappear BOOL animated NSNotificationCenter defaultCenter removeObserver self Note There might be an instance using viewWillDisappear where you receive a memory warning and the observer never gets..
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present BOOL animated unregister for keyboard notifications while not visible. NSNotificationCenter defaultCenter removeObserver self name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter removeObserver self name UIKeyboardWillHideNotification..
http://stackoverflow.com/questions/1328638/placeholder-in-uitextview UILabel placeHolderLabel @end @implementation UIPlaceHolderTextView void dealloc NSNotificationCenter defaultCenter removeObserver self #if __has_feature objc_arc #else _placeHolderLabel release _placeHolderLabel nil _placeholderColor release _placeholderColor..
Is calling [self release] allowed to control object lifetime? http://stackoverflow.com/questions/1385433/is-calling-self-release-allowed-to-control-object-lifetime no longer needed and should go away. So is the following allowed void destroyMyself NSNotificationCenter defaultCenter removeObserver self self release iphone objective c share improve this question The rules are simple. You should only release an..
Detecting when camera's iris is open on iPhone http://stackoverflow.com/questions/1570419/detecting-when-cameras-iris-is-open-on-iphone
UITextField: move view when keyboard appears http://stackoverflow.com/questions/1775860/uitextfield-move-view-when-keyboard-appears name UIKeyboardWillHideNotification object nil return self void dealloc NSNotificationCenter defaultCenter removeObserver self super dealloc @synthesize delegate @synthesize frame void keyboardWillShow NSNotification notification CGRect oldFrame..
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id init self super init if self return nil Add this instance of TestClass as an observer of the TestNotification...
Dismissing UIAlertViews when entering background state http://stackoverflow.com/questions/3105974/dismissing-uialertviews-when-entering-background-state privateDelegate delegate return self void dealloc privateDelegate nil NSNotificationCenter defaultCenter removeObserver self name UIApplicationDidEnterBackgroundNotification object nil super dealloc void setDelegate id delegate privateDelegate.. super dismissWithClickedButtonIndex self cancelButtonIndex animated NO NSNotificationCenter defaultCenter removeObserver self name UIApplicationDidEnterBackgroundNotification object nil #pragma mark UIAlertViewDelegate The code below avoids.. didDismissWithButtonIndex aSelector @selector alertView clickedButtonAtIndex NSNotificationCenter defaultCenter removeObserver self name UIApplicationDidEnterBackgroundNotification object nil return privateDelegate else return super forwardingTargetForSelector..
Handling applicationDidBecomeActive http://stackoverflow.com/questions/3639859/handling-applicationdidbecomeactive
Prevent indentation of UITableViewCell (contentView) while editing http://stackoverflow.com/questions/5789467/prevent-indentation-of-uitableviewcell-contentview-while-editing options NSKeyValueObservingOptionOld context nil IMPORTANT remove the cell as an observer in dealloc self.contentView removeObserver self forKeyPath @ frame This will only allow the frame to change to values with an origin.x 0 . Remove the NSLog lines for..
When does an associated object get released? http://stackoverflow.com/questions/6039309/when-does-an-associated-object-get-released observedObject addObserver self forKeyPath keyPath options 0 context nil return self void dealloc observedObject removeObserver self forKeyPath keyPath keyPath release super dealloc void observeValueForKeyPath NSString keyPath ofObject id object change..
MPMoviePlayer done button issue http://stackoverflow.com/questions/6142571/mpmovieplayer-done-button-issue that handler void MPMoviePlayerDidExitFullscreen NSNotification notification NSNotificationCenter defaultCenter removeObserver self name MPMoviePlayerDidExitFullscreenNotification object nil moviePlayerController stop moviePlayerController.view..
How to resize UITextView on iOS when a keyboard appears? http://stackoverflow.com/questions/7169702/how-to-resize-uitextview-on-ios-when-a-keyboard-appears name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL animated NSNotificationCenter defaultCenter removeObserver self void moveTextViewForKeyboard NSNotification aNotification up BOOL up NSDictionary userInfo aNotification userInfo NSTimeInterval..
Core Data and threads / Grand Central Dispatch http://stackoverflow.com/questions/7540801/core-data-and-threads-grand-central-dispatch
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample query notification object query disableUpdates query stopQuery self loadData query NSNotificationCenter defaultCenter removeObserver self name NSMetadataQueryDidFinishGatheringNotification object query _query nil we're done with it void loadDocument 2 iCloud..
Keeping object on top of keyboard in the event of becomeFirstResponder or resignFirstResponder? http://stackoverflow.com/questions/8704137/keeping-object-on-top-of-keyboard-in-the-event-of-becomefirstresponder-or-resign . You should unregister in your dealloc or viewWillDisappear animated void dealloc NSNotificationCenter defaultCenter removeObserver self Of course the tricky bit is in the keyboardWillHideOrShow method. First I extract the animation parameters from the..
trying to update a UILabel on a parent view controller when dismissing the modal view http://stackoverflow.com/questions/8917330/trying-to-update-a-uilabel-on-a-parent-view-controller-when-dismissing-the-modal
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