RLMObject with Array of NSStrings

Question

I've been upgrading a project to use Realm as the persistence store and I'm not able to find any documentation on how to use an array of strings in one of my models.

The implementation of an Array for a RLMObject is to use an RLMArray where T inherits RLMObject

I could make an object that inherits.. property inside which is string... but that seems like quite some overhead to replace an NSArray of strings.

Does anyone know the recommended best practice to do this?

Thomas Goyne · Accepted Answer · 2017-12-21 23:35:16Z

23

As of Realm Cocoa 3.0 you can simply do RLMArray<RLMString> *array; and no longer need the wrapper object type.

In older versions of Realm you need an RLMObject which contains the string:

@interface StringObject : RLMObject
@property NSString *value;
@end
RLM_ARRAY_TYPE(StringObject)

@implementation StringObject
@end

@interface Object : RLMObject
@property RLMArray<StringObject> *array;
@end

edited Dec 21, 2017 at 23:35

answered Aug 7, 2014 at 17:45

Thomas Goyne

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3 Comments

Zeb Over a year ago

Am I the only one with this error? this class is not key value coding-compliant for the key value.

JiteshW Over a year ago

@Thomas Goyne, Converting StringObject back to NSSString (i.e. stringObj.value) gives error. Any idea ?

kemdo Over a year ago

didnt work for me, StringObject and NSString does work

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