2014/10/15 下午 10:12:20

iphone Programming Glossary: ofobject

Get notification when NSOperationQueue finishes all tasks

http://stackoverflow.com/questions/1049001/get-notification-when-nsoperationqueue-finishes-all-tasks

options 0 context NULL Then do this in your observeValueForKeyPath void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if object self.queue keyPath isEqualToString @ operations if.. Do something here when your queue has completed NSLog @ queue has completed else super observeValueForKeyPath keyPath ofObject object change change context context This is assuming that your NSOperationQueue is in a property named queue EDIT iOS..

Center text vertically in a UITextView

http://stackoverflow.com/questions/12591192/center-text-vertically-in-a-uitextview

to adjust the contentOffset every time the contentSize value changes void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context UITextView tv object CGFloat topCorrect tv bounds .size.height..

Streaming mp3 audio with AVPlayer

http://stackoverflow.com/questions/13131177/streaming-mp3-audio-with-avplayer

target self selector @selector updateProgress userInfo nil repeats YES void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if object songPlayer keyPath isEqualToString @ status if songPlayer.status..

HowTo initialise MKMapView with a given user location?

http://stackoverflow.com/questions/1437568/howto-initialise-mkmapview-with-a-given-user-location

when the location attribute of the mapview's userlocation has a value void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if self.map isUserLocationVisible self.locationManager stopUpdatingLocation..

How does undo/redo basically work on iPhone OS?

http://stackoverflow.com/questions/2449268/how-does-undo-redo-basically-work-on-iphone-os

the opposite actions to any edits or other changes you make. For example void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context NSUndoManager undo self undoManager Grab the old value of the.. NSKeyValueChangeOldKey Add edit item to the undo stack undo prepareWithInvocationTarget self changeKeyPath keyPath ofObject object toValue oldValue Set the undo action name in the menu undo setActionName @ Edit can be used to observe changes..

How do I zoom an MKMapView to the users current location without CLLocationManager?

http://stackoverflow.com/questions/2473706/how-do-i-zoom-an-mkmapview-to-the-users-current-location-without-cllocationmanag

context NULL Then implement this method to receive KVO notifications void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if self.mapView showsUserLocation self moveOrZoomOrAnythingElse..

observeValueForKeyPath not being called

http://stackoverflow.com/questions/2728638/observevalueforkeypath-not-being-called

NSKeyValueObservingOptionOld context nil then in the same file I have void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context NSLog @ @ n @ n @ n keyPath object change But although I have..

Change background color of UIButton when Highlighted

http://stackoverflow.com/questions/4022763/change-background-color-of-uibutton-when-highlighted

highlighted options NSKeyValueObservingOptionNew context NULL return self void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context self setNeedsDisplay void drawRect CGRect rect super drawRect..

An -observeValueForKeyPath:ofObject:change:context: message was received but not handled

http://stackoverflow.com/questions/4120539/an-observevalueforkeypathofobjectchangecontext-message-was-received-but-not

observeValueForKeyPath ofObject change context message was received but not handled I am relatively new to KVO so there is a good chance that I am violating.. app due to uncaught exception 'NSInternalInconsistencyException' reason ' CGImage 0x276fc0 An observeValueForKeyPath ofObject change context message was received but not handled. Key path measurementDescriptor Observed object MeasurementPointer 0x8201640.. 0x30897d4f NSException raise format 34 4 Foundation 0x34a13779 NSObject NSKeyValueObserving observeValueForKeyPath ofObject change context 60 5 Foundation 0x349b6acd NSKeyValueNotifyObserver 216 6 Foundation 0x349b6775 NSKeyValueDidChange 236..

Customize the Airplay button's appearance

http://stackoverflow.com/questions/5174204/customize-the-airplay-buttons-appearance

sizeToFit Then I observe the changed value of the buttons alpha . void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if object isKindOfClass UIButton class change valueForKey NSKeyValueChangeNewKey..

Get the screenshot of a streaming video on iphone

http://stackoverflow.com/questions/5388226/get-the-screenshot-of-a-streaming-video-on-iphone

playerItem addObserver self forKeyPath @ status options 0 context nil void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if keyPath isEqualToString @ status AVPlayerItem item AVPlayerItem..

How can I get autofocus to work in a second AVCaptureSession without recreating the sessions?

http://stackoverflow.com/questions/5427561/how-can-i-get-autofocus-to-work-in-a-second-avcapturesession-without-recreating

stopRunning _topSession startRunning NSLog @ Top session now running. void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context NSLog @ Observed value for key at key path @. keyPath Enable..

Prevent indentation of UITableViewCell (contentView) while editing

http://stackoverflow.com/questions/5789467/prevent-indentation-of-uitableviewcell-contentview-while-editing

to your particular needs. put this in your UITableViewCell subclass void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context NSLog @ observed value for kp @ changed @ keyPath change if keyPath..

When does an associated object get released?

http://stackoverflow.com/questions/6039309/when-does-an-associated-object-get-released

removeObserver self forKeyPath keyPath keyPath release super dealloc void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context self.delegate performSelector self.delegateCallback @end iphone..

Fade in/out UIScrollView's content like Mobile Safari does in its tab

http://stackoverflow.com/questions/875129/fade-in-out-uiscrollviews-content-like-mobile-safari-does-in-its-tab

each of my contentViews will get the message when contentOffset changed void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context self performSelector SEL context withObject change And my contentViews..

iPhone : camera autofocus observer?

http://stackoverflow.com/questions/9100357/iphone-camera-autofocus-observer

dealing with KVO Key Value Observing . In my UIViewController callback void observeValueForKeyPath NSString keyPath ofObject id object change NSDictionary change context void context if keyPath isEqualToString @ adjustingFocus BOOL adjustingFocus..