On Aug 9, 2012, at 10:47 AM, Ken Thomases <k...@codeweavers.com> wrote:
> Better would be to create a property on your controller which returns the
> predicate, constructing it on demand for each call (perhaps with some smart
> caching). (I'll call the property "minMaxPredicate" for discussion.) Bind
> the array controller's filterPredicate binding to that property on your
> controller. Then, arrange for KVO change notifications to be emitted for the
> property when the minimum and maximum value properties change. The easiest
> way to do this is to add a method like the following to your class:
>
> + (NSSet *) keyPathsForValuesAffectingMinMaxPredicate
> {
> return [NSSet setWithObjects:@"minimumValue", @"maximumValue", nil];
> }
Thanks Ken. I implemented this all, but are having some trouble with the
correct syntax for the predicate I'll use for this:
I added this to my Controller loadview method:
self.minMaxPredicate = [NSPredicate predicateWithFormat:@"%f < value < %f",
self.minValue, self.maxValue];
Where the float "value" is a property of the entity that I am displaying in
the table and self.minValue and self.maxValue are floats bound to my
NSTextFields.
But no matter what I try, I get an error "Unable to parse the format string".
Any suggestions?
- Koen.
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