On May 14, 2015, at 08:40 , William Squires wrote:
>
> I'd like to know how to properly write a value transformer in Swift.
Something like this, I expect:
> class StringNotNilTransformer: NSObject {
>
> static var transformedValueClass: AnyClass { return NSNumber.self }
> sta
Thanks, I didn't even think of that, but yeah, it would be easier. Still, I'd
like to know how to properly write a value transformer in Swift.
On May 12, 2015, at 5:38 PM, Quincey Morris
wrote:
> On May 12, 2015, at 14:29 , William Squires wrote:
>>
>> class IsNotEmptyTransformer : NSValueTr
On May 12, 2015, at 22:19 , Uli Kusterer wrote:
>
> I think at least one of those should be “message” instead of “messageIsEmpty”
> … ?
Indeed — the second one.
I’m also not absolutely sure that a computed static property will have the
desired effect. It may have to be a static method. But pe
On 13 May 2015, at 00:38, Quincey Morris
wrote:
> static var keyPathsForValuesAffectingMessageIsEmpty: NSSet {return NSSet
> (object: "messageIsEmpty”)}
I think at least one of those should be “message” instead of “messageIsEmpty” …
?
Cheers,
-- Uli Kusterer
“The Witnesses of TeachText are ev
On May 12, 2015, at 15:38 , Quincey Morris
wrote:
>
> dynamic var message: String
> dynamic var messageIsEmpty: Bool {return String == “”}
> static var keyPathsForValuesAffectingMessageIsEmpty: NSSet {return NSSet
> (object: "messageIsEmpty”)}
FWIW, a Swift-ier way to do this might be somethin
On May 12, 2015, at 14:29 , William Squires wrote:
>
> class IsNotEmptyTransformer : NSValueTransformer
> {
> }
>
> but the example in the documentation is in ObjC, not Swift, and refers to id,
> not to "Bool"s or "String"s. Hints, anyone?
Using a value transformer at all seems like a poor cho
> On May 12, 2015, at 2:29 PM, William Squires wrote:
>
> but the example in the documentation is in ObjC, not Swift, and refers to id,
> not to "Bool"s or "String"s. Hints, anyone?
‘id’ in Obj-C is ‘AnyObject’ in Swift. You’ll need to use the “as” or “as?”
operator to type-cast it to NSNumbe
I'm trying to make what should be a fairly simple value transformer. I need to
bind the Enabled state of a control (NSButton in this case, but it could be any
control) to the .isEmpty state of a string. I would think this a common enough
task that an existing value transformer would be supplied,
