I have a array of objects that select开发者_开发百科ed from core data. I need select from this set subset of object that correspond to condition.
The difference between these two lines of code is that the second is KVO compliant and the first isn\'t?
When I bind a control to an NSArrayController using Interface Builder, there are a variety of开发者_StackOverflow options under the \"Controller Key\" field in the bindings inspector.
I\'ve read a lot about NSDecimal, NSNumber, NSNumberDecimal, CFNumber... and it begins to be a kind of jungle to me.
In Objective-C on Apple there is something called \"Key-Value Coding\" that allows you to traverse the object graph using strings similar to filesystem paths.There\'s an informal protocol (i.e. interf
I have a class that looks like this: @interface Properties : NSObject { @private NSNumber* prop1; NSNumberBool* prop2;
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