On Aug 10, 2012, at 12:28 PM, Fritz Anderson wrote:
> They are not alternatives, and the conversion to NSNumber is not optional.
> You have to do all three.
What? There's no requirement that one use NSNumbers. And BETWEEN is a nice
clear operator to use, but it would be fine to do "%f < value && value < %f".
In fact, the docs for BETWEEN state that it's equivalent to that sort of thing
(except using <= instead of <, which the OP should consider which he wants).
A perfectly suitable solution is:
- (NSPredicate*) minMaxPredicate
{
return [NSPredicate predicateWithFormat:@"%f < value && value < %f",
self.minimumValue, self.maximumValue];
}
+ (NSSet *) keyPathsForValuesAffectingMinMaxPredicate
{
return [NSSet setWithObjects:@"minimumValue", @"maximumValue", nil];
}
Regards,
Ken
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