iphone - On Objective-C/Cocoa Key-Value coding and arrays -

I work "correctly" to popularize an array with key-value coding for an iPhone app I am trying to I've been doing some work, but it's a lot of laughter. Actually I'm parsing an XML document in the set of code-generated models. Suppose XML is of this format:

  & lt; Foo & gt; & Lt; Bars & gt; & Lt; Item name = "falcon" /> & Lt; Item name = "swamp" /> & Lt; / Bars & gt; & Lt; / Foo & gt;  

The bar that represents the element on my generated object, I have NSMutableArray defined for the sub-node:

  @interface bar: NSObject { NSMutableArray * items; } @end  

By default when I call set value: forKey: At an instance of the bar, it ends in overwriting an example of NSMutableArray with an example of an object is. To do this work, what I have done now, where this hack is found I changed the name of the array instance variable to be something else, suppose that the name is plural form:

  @ Interface bar: NSOJECT {NSMutableArray * item; } @end  

This causes the default accessory for setValue: forKey: miss to after that I added this method to the bar implementation:

  - (zero) Set Value: Defined for (id) value: (NSString *) key {if ([key isqualToString: @ "item"]) {if (objects == zero) {items = [[NSMUTABELARROL] INST ]; [Maintaining objects]; } [Objects addObject: value]; }}  

And everything works! I'm sure there should be a better way to do this! I have read through the key-value coding programming guide, but I should remember something, because I'm not clear how to work for array accessories. I have tried to execute countOf and ObjectInAtIndex: As they point to the KVC programming guide, but also with my NSMutableArray being overwritten with an example type of item

If you want to use a KVC property for an array, you should see the mutableArrayValueForKey: < / Code>

In the documentation should look at your class:

  @Interface Bar: NSOBK {NSMutableArray * items; } @end  

You will minimize these methods, and assume that you have started your Array elsewhere:

  - (zero ) Insert object: (id) object InItemsAtIndex: (NSUInteger) index {[item insertObject: index on object: index]; } - (Zero) Remove Object FreemedEmax: (NSUntegaeer) Index {[Object deletion Objective Index: Index]; } - (NSArray *) Item {/ * How do you probably want to come back based on the Pentecost [NSArray arrayWithArray: items] * / return items; }  

Once you implement these methods, you can call [bar mutableArrayValueForKey: @ "items"] . This will return a NSMutableArray proxy object that you can add and remove objects. That object will in turn generate useful KVO messages and will use the methods to interact with your actual array.