In my UIScrollView subclass, I\'m observing frame changes: [self addObserver:self forKeyPath:@\"frame\" options:0 context:NULL];
In the Key-Value Observing Programming Guide, the section Registering开发者_如何学Python for Key-Value Observing says \"Typically properties in Apple-supplied frameworks are only KVO-compliant if they
So I\'m fairly new to Core Data and KVO, but I have an NSManagedObject subclass that is successfully observing its own to-many relationship.The problem is, on observed changes, I want to iterate throu
My app is want to get the albums list of the iphone and all the photos in certain album. In the app I enumerate the photos in one album of the iphone.
I have a NSCollectionView wich content is handled by a NSArrayController. The NSCollectionView is selectable and I need to retrieve a list of selected elements.
I have a quick question regarding KVO. I understand that for a NSArray if observing additions is desired you can do the following.
This might seem straightforward, but the following code does not work, because the \"observeValueForKeyPath\" function is never called, although I keep changing the text in the NSTextfield:
Do change notifications cascade with KVO down to their properties or is there any elegant way that does not include implementing it manually by simply observing both parent and child changes?
I\'m having a real pain trying to figure out why KVO is retaining all values that are being observed.
I\'m reading a book on Objective-c and learning about the undo manager.The concept seems very simple but the provided example seems overly complex.Basically, I have a table view connected to an NSArra
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