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Asked: 2026-05-21T22:09:18+00:00

I see that there is a bunch of posts on this topic, but a

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I see that there is a bunch of posts on this topic, but a solution is not clicking in my head. Here is my issue:

double var = [[variables objectForKey:[value characterAtIndex:1]] doubleValue];

variables is an NSDictionary. value in this situation is an NSString and I need characterAtIndex:1 because I prepended the string with a special designator. In English, I want to get a value from my NSDictionary based on this NSString key, but I get this warning when building:

warning: passing argument 1 of ‘objectForKey:’ makes pointer from integer without a cast

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1 Answer

  1. Editorial Team

    characterAtIndex: returns a unichar, not an object, while NSDictionary keys must be objects. It sounds like you want something like [value substringToIndex:1].

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