Re: Swift -> Obj-C: return __kindof Something
Re: Swift -> Obj-C: return __kindof Something
- Subject: Re: Swift -> Obj-C: return __kindof Something
- From: Alex Zavatone via Cocoa-dev <email@hidden>
- Date: Mon, 11 Nov 2019 20:31:58 -0600
You should be able to look at the header in Swift for your Objective-C class
and see what it should be.
> On Nov 11, 2019, at 8:06 PM, Steve Christensen via Cocoa-dev
> <email@hidden> wrote:
>
> Yep, I understand what it does. I’m trying to get the same class-or-subclass
> behavior during compilation. I’d looked at the stack overflow article
> earlier, so I’ll check out the Swift forum to see what’s there. Thanks.
>
>> On Nov 11, 2019, at 4:43 PM, Quincey Morris
>> <email@hidden> wrote:
>>
>>> On Nov 11, 2019, at 15:07 , Steve Christensen via Cocoa-dev
>>> <email@hidden <mailto:email@hidden>> wrote:
>>>
>>> Some existing Obj-C methods are of the form:
>>>
>>> + (nullable __kindof NSManagedObject) someFooThing;
>>>
>>> Right now I have
>>>
>>> class var someFooThing: NSManagedObject?
>>
>> AFAIK, “__kindof” only affects the ability to assign one Obj-C class pointer
>> to a variable of a different but compatible (kind of) type. It doesn’t
>> change the actual type of the variable, nor does it (again AFAIK) change the
>> ability to assign without errors in Swift. Also see here for some
>> informative discussion:
>>
>> https://stackoverflow.com/questions/31399208/ios-kindof-nsarray
>> <https://stackoverflow.com/questions/31399208/ios-kindof-nsarray>
>>
>> I suggest you ask about this on forums.swift.org <http://forums.swift.org/>.
>> If there’s an alternative, someone there will know.
>
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