How to determine the true data type of an NSNumber?

Question

Consider this code:

NSNumber* interchangeId = dict[@\"interchangeMarkerLogId\"];
long long llValue = [interchangeId longLongValue];
double dValue = [intercha         


        

Answer 1

Simple answer: You can't.

In order to do what you're asking, you'll need to keep track of the exact type on your own. NSNumber is more of a "dumb" wrapper in that it helps you use standard numbers in a more objective way (as Obj-C objects). Using solely NSNumber, -objCType is your only way. If you want another way, you'd have to do it on your own.

Here are some other discussions that may be of help:

get type of NSNumber

What's the largest value an NSNumber can store?

Why is longLongValue returning the incorrect value

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