Obj-C determing integer values with isKindOfClass

objective-c

Solution

You can't actually store `NSInteger` in an `NSArray`, since it isn't an object. If you are storing numbers in your array, they are most likely instances of `NSNumber`, so you would check for:

if ([obj isKindOfClass:[NSNumber class]]) { ... }

iPhone Developer Tips gives a good summary of the difference between `NSInteger` and `NSNumber`.

Problem

I need to check the type of each element in an array... ``` for(id obj in items) { if([obj isKindOfClass:[NSString class]]) { //handle string case } else if([obj isKindOfClass:[NSInteger class]]) { //THIS LINE GIVES ERROR //handle int case } } ``` Of course `NSInteger` is just an alias for `int`, so how can I check for this at runtime?

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