How to Call an Instance Method From a Variable Name [duplicate]

Question

Possible Duplicate:
object with the name of a string

I want to call the code below, but be able to change "itemInstance" with a stringe variable. Is this possible?

UIImage *image = [itemInstance getImage:itemNumber];

EDIT: I just read about the NSSelectorFromString method which appears to be what I need to use, but I have no idea how it's supposed to implemented. Any ideas?

possible duplicate of object with the name of a string, Object name from string — jscs
– jscs, Commented Jun 4, 2012 at 17:18
@Caleb, I said what I was trying to accomplish in my first sentence... Phillip answered the question. Josh, yes, those do appear to be similar. I didn't see those before. However, I think that the question is still helpful because it is slightly different. — William LeGate
– William LeGate, Commented Jun 4, 2012 at 18:54

Phillip Mills · Accepted Answer · 2012-06-04 16:30:25Z

3

Not exactly. The simplest way to get that effect is to build a NSDictionary with your strings as the keys and the matching instances as the values. Then it becomes something like:

UIImage *image = [[dict objectForKey:instanceName] getImage:itemNumber];

answered Jun 4, 2012 at 16:30

Phillip Mills

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2 Comments

William LeGate Over a year ago

Could I use an NSArray instead? I'm going to try that now...

Phillip Mills Over a year ago

If you can identify the instance in an array, I guess. I picked a dictionary because you said you wanted to select by string.

William LeGate · Accepted Answer · 2012-06-04 18:11:34Z

0

I solved it by selecting the instance from an NSArray. I am selecting Phillips answer though because it got me to where I needed to get.

answered Jun 4, 2012 at 18:11

William LeGate

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