Re: NSMutableDictionary or Custom Object when adding properties?
Re: NSMutableDictionary or Custom Object when adding properties?
- Subject: Re: NSMutableDictionary or Custom Object when adding properties?
- From: Trygve Inda <email@hidden>
- Date: Fri, 17 May 2013 13:43:00 -0700
- Thread-topic: NSMutableDictionary or Custom Object when adding properties?
>
> On May 16, 2013, at 11:41 PM, Graham Cox <email@hidden> wrote:
>
>>> There is setValue:forUndefinedKey: and then each object could keep a local
>>> dictionary of these "defined at runtime" keys.
>>
>> There are low-level runtime methods that allow you to add properties at
>> runtime. I'm not sure whether that's considered good practice, but it's
>> doable.
>
> MYDynamicObject is a class I wrote that enables this:
> https://github.com/snej/MYUtilities/blob/master/MYDynamicObject.h
> You can subclass this, add properties to the @interface, and then mark them as
> @dynamic in the @implementation. Then you just need to implement a generic
> getter and setter method to do something like store the value in an internal
> mutable dictionary.
>
> (This is just like what NSManagedObject does with @dynamic properties, only in
> a more generic form.)
>
> —Jens
How is this really any different than using setValue:forUndefinedKey?
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