On 14 Aug 2014, at 19:24, Roland King <r...@rols.org> wrote:
>>
>> class AppDelegate: NSObject
>> {
>> dynamic var statusString : String? // bound to some TextField
>>
>> let someThing = SomeClass( myStatusHandler ) <---- this
>> creates strange error messages
>>
>> func myStatusHandler( s: String )
>> {
>> statusString = s
>> }
>> }
>>
>> class SomeClass
>> {
>> private let statusHandler: (String) -> Void
>>
>> init( statusHandler: (String) -> Void )
>> {
>> self.statusHandler = statusHandler
>> }
>> }
>>
>> Gerriet.
>>
>
>
> What you’re doing there doesn’t make much sense to me. myStatusHandler is an
> instance method (or whatever it’s called in Swift). You’re trying to assign
> it outside the context of an actual instance, there’s no ‘self’ at that
> point. I don’t really know what the type of myStatusHander is at the point
> you’re trying to assign it, probably something which takes an AppDelegate and
> returns a (String)->Void function, or something like that, ie
> (AppDelegate)->(String)->Void. Whatever it is it’s not a (String)->Void
> function.
>
> if you write an init() method and put it in there there’s context for it,
> self exists
>
> class AppDelegate: NSObject
> {
> dynamic var statusString : String? // bound to some TextField
> let someThing : SomeClass?
>
> func myStatusHandler( s: String )
> {
> statusString = s
> }
>
> override init()
> {
> super.init()
> someThing = SomeClass( self.myStatusHandler )
> }
> }
>
> class SomeClass
> {
> private let statusHandler: (String) -> Void
>
> init( statusHandler: (String) -> Void )
> {
> self.statusHandler = statusHandler
> }
> }
>
> let a = AppDelegate();
> a.someThing
>
> and yes you have to do the little let someThing: SomeClass? dance so you can
> use super.init() before using myStatusHandler.
>
> I’m almost entirely sure there’s a far better way to do what you’re trying to
> do which doesn’t involve quite this much ugly. Not loving this syntax yet,
> really, just not getting into it and I’m not even trying anything hard.
Thanks a lot: doing it your way it works perfectly.
Kind regards,
Gerriet.
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