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Equivalent of isKindOfClass for Foundation Types?
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Equivalent of isKindOfClass for Foundation Types?


  • Subject: Equivalent of isKindOfClass for Foundation Types?
  • From: "Christopher Hickman" <email@hidden>
  • Date: Thu, 4 May 2006 11:44:41 -0400

I need to test if the value passed to my NSValueTransformer is an
NSTimeInterval.  Since NSTimeInterval is just a typedef from double and not
a class, I can't use the NSObject methods to test its type.

The best I can think of now is to test it with typeof() against
NSTimeInterval, but I think I should really allow any numeric type for this
transformer.

Currently my code says this:

- (id)transformedValue:(id)value;
{
	if (typeof(value) != typeof(NSTimeInterval)) { //bail if not
NSTimeInterval
		return nil;
	end if

	NSMutableString *result = [NSMutableString string];

	//do my stuff
	return result;
}

What is the best way to test this value to see if it is numeric, so my
transformer could be a little more flexible?

Topher

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