Objective C: NSRange or similar with float?

Question

For some methods I want them to return a range of values (from: 235, to: 245). I did this using NSRange as a return value

- (NSRange)giveMeARangeForMyParameter:(NSString *)myParameter;

This works fine as long as the return value is an integer range (e.g. location: 235, length: 10).

But now I have the problem that I need to return a float range (e.g. location: 500.5, length: 0.4). I read in the doc that NSRange is a typedefed struct with NSUIntegers. Is it possible to typedef another struct for float ranges? And if so, can there be a similar method to NSMakeRange(NSUInteger loc, NSUInteger len) to create those float ranges?

Answer 1

Although you could reuse one of several "pair objects" from the graphics library (you can pick from a CGPoint or CGSize, or their NS... equivalents) the structs behind these objects are so simple that it would be better to create your own:

typedef struct FPRange {
    float location;
    float length;
} FPRange;

FPRange FPRangeMake(float _location, float _length) {
    FPRange res;
    res.location = _location;
    res.length = _length;
    return res;
}