I have a model with a MutableProperty<Bool>
and I have a UIButton
(ctaTopButton) that should flip that property when it's pressed, for example, on click true becomes false and vice versa.
I have it setup this way:
let producer = ctaTopButton.rac_signalForControlEvents(UIControlEvents.TouchUpInside).toSignalProducer()
|> map {value in !self.model.enabled.value}
// model.enabled <~ producer
The crux of my issues comes from rac_signalForControlEvents(...).toSignalProducer()
returns a SignalProducer<AnyObject?, NSError>
which the map converts to SignalProducer<Bool, NSError>
The infix operator <~
however only works with SignalProducer<Bool, NoError>
so I need to convert my producer somehow.
My question is, how do I demote errors? I know there is a promoteErrors
for converting NoError
to NSError
. There is also mapError
though I can't figure out how get back an instance of NoError
as it has no initializers.
You can use
catch()
operator for that case like: