in my NSObject subclass\'s -init method the instance adds itself as an observer of some of its own keyPaths in order to trigger an action that should occur any time one of the properties in question i
I want to get a number of variables from the target of the function - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
I have a Core Data entity, \"bid\", which has a relationship to many \"items\", called \"itemLink\". in IB, I have a text field bound to \"total\", and that almost works.
I have two NSManagedObject subclasses derived from entities, ActivityMember and Member. Member has a property called name, and ActivityMember, through a one to one relationship with Member, has a prop
I know there is a way to see what properties are being observed on an object with observationInfo but is there a way to see what an object is set to observe?
If I @synthesize my property (artist) everything works fine add observer for keyPath artist.name call [myObj setValue:newArtist forKey:@\"artist\"];
Important: Not all classes are KVO-compliant for all properties. You can ensure your own classes are KVO-compliant by following the steps
I\'ve defined two properties with corresponding ivars and synthesized them: @property (nonatomic,copy) NSString* title;
I am trying to observe the \"currentTime\" property of AVAudioPlayer. But the method isn\'t even being called... I need it to set the position of a UISlider..
This question already has an answer here: NSNotification VS KVO (1 answer) 开发者_如何学Python Closed 8 years ago.