Re: Store NSPredicate in Core Data
Re: Store NSPredicate in Core Data
- Subject: Re: Store NSPredicate in Core Data
- From: Martin Hewitson <email@hidden>
- Date: Sun, 17 Oct 2010 19:15:55 +0200
If it's still of use, I did this with predicateWithFormat: and -description wrapped up in a NSValueTransformer subclass. In other words I store a string representation in the core-data model. I don't know if this is always valid, but it works well for the predicates in my app.
Martin
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Martin Hewitson
AEI Hannover
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On 17 Oct 2010, at 14:18, Ivan C Myrvold <email@hidden> wrote:
> After some thought I found out that I can use NSkeyedArchiver and NSKeyedUnarchiver to make an NSData and back to NSPredicate instance. Then it is possible to store NSData into Core Data.
>
>
> Den 17. okt. 2010 kl. 12.48 skrev Ivan C Myrvold:
>
>> I am building an application where I am using an NSPredicateEditor. Now I would like to store the resulting NSPredicate from the NSPredicateEditor in Core Data. I am not sure how to accomplish that.
>> I was thinking about using NSCoder, but not sure how to use NSCoder for this as it usually is used to archive directly to disk and not with Core Data.
>>
>> Do anyone have any hint?
>>
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