How to convert a string into object variable in ObjectiveC (iOS)

Question

I am asking myself how can I convert string value into an object variable in Objective C - iOS. I know that in JavaScript you can do this with eval() function.

I want something like that:

NSString *variableString = @"variable";
NSNumber *myVariable = myObject.{variableString};

It this possible in ObjectiveC ?

Thanks

obr · Accepted Answer · 2012-01-13 14:30:00Z

3

Use Key Value Coding, KVC.

NSString *string = [myInstance valueForKey:@"stringProperty"];

answered Jan 13, 2012 at 14:30

obr

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2 Comments

Borut Over a year ago

And I thought that KVC only works with array and dictionaries. Thanks man!

Borut Over a year ago

Do you know how can I retrieve myInstance object instead of his value? I need this cos I need to check which data type is conforming object... ?

Daan van Hasselt · Accepted Answer · 2012-01-13 14:34:09Z

-2

If I understand correctly what you mean by an object variable, you are looking for objective-c's id. See this blogpost for a great explanation of id: http://unixjunkie.blogspot.com/2008/03/id-vs-nsobject-vs-id.html.

answered Jan 13, 2012 at 14:34

Daan van Hasselt

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