How to know the type of number stored on NSNumber?

Question

How to know the type of the number is stored on NSNumber object? In other words, is there a way to check the entry type of the number when NSNumber was created?

Let's suppose that I store some random number on NSNumber object:

NSNumber *intNumber = [NSNumber numberWithInt:1];

Of course I will want to retrieve it using the intValue method later:

int theValue = [intNumber intValue];

But if the number came from a unknown source, an API JSON response or whatever and I just parse it as a NSDictionary, resulting on something like this:

{
    "Some key" : 1,
    "Some other key" : 74.1234
}

We can assume that Some key has an int value, while Some other key has a double.

Is there a way to check which type is the appropriated to parse the value on each key? Something that I could use like:

for (NSNumber *number in _arrayOfNumbers) {

    if (/*number is integer*/) {

        //do integer stuff

    } else if (/*number is double*/) {

        //do double stuff
    }
}

I don't know if I would need to use this on a real situation, but I was just wondering If there is a way to check the "entry type" of the number.

Thanks in advance.

Answer 1

Use CFNumberGetType

CFNumberGetType((CFNumberRef)number);

You can throw this value into a switch statement for each value of the enum CFNumberType.