[aerogear-dev] Swift to Objective-C interop: one aspect of iOS7 Swift support

[Matthias Wessendorf]

On Fri, Jan 23, 2015 at 10:04 AM, Corinne Krych <corinnekrych at gmail.com>
wrote:

>
> > On 23 Jan 2015, at 10:00, Matthias Wessendorf <matzew at apache.org> wrote:
> >
> >
> >
> > On Fri, Jan 23, 2015 at 9:30 AM, Corinne Krych <corinnekrych at gmail.com>
> wrote:
> > Hello all,
> >
> > Yesterday I was discussing with Sebi about @objc and how you make a
> Swift class available in Objective-C
> >
> > Sebi has one issue, in its Swift protocol he wants to declare
> longitude/latitude Double and make them optional [1]. Because his protocol
> is swift only (not inheriting a Obj-c one) he uses @objc and this is when,
> compiler complains with “Property cannot be marked @objc because its type
> cannot be represented in Objective-C”.
> >
> > This issue is well-explain in this stack overflow thread [2]
> > One work-around (the one used by Sebi) is to use NSNumber and make then
> optional.
> >
> > To echo that issue, yesterday Christos on this thread [3] gave the
> example of QueryKit which uses pod subspec coupled with some Objective-C
> re-write classes (seen as temporary) to bridge the gap Swift to Objective-C
> fro a Swift first library.
> >
> > As we’re talking about iOS7 support for our Swift libs there are 2
> aspect of it:
> > - support from obj-c code is one aspect
> > - dynamic fwk support as expained in this thread [4] is another one…
> >
> > All in one, it makes me wonder if it’s worth it… all those hacks in
> Swift code.
> >
> > +1
> >
> > Maybe the option we used for ios-push lib i.e.: having obj-c and swift
> version of the lib would be a better approach.
> >
> > that means we need to code the missing parts on our other libs, like
> http or oauth, right ?
> >
> >
>
>
> Yeap, OAuth2 will be a good one to start with…
>

+1


> Part of it was already written in objc in 1.6.X code base. It’s based on
> AFNetworking for the http layer.
> Maybe we can keep using AFNet and no need to move ios-http to obj-c
>

+1000


>
> >
> > ++
> > Corinne
> > [1]
> https://github.com/sebastienblanc/helloworld-geo-ios/blob/master/UnifiedGeo%2FUnifiedGeo%2FAGClientDeviceInformation.swift#L46
> > [2]
> http://stackoverflow.com/questions/26366082/cannot-access-property-of-swift-type-from-objective-c
> > [3]
> http://aerogear-dev.1069024.n5.nabble.com/aerogear-dev-Parallel-support-for-a-Cocoapods-Swift-Obj-c-library-td10632.html
> > [4]
> http://aerogear-dev.1069024.n5.nabble.com/aerogear-dev-Swift-Frameworks-Static-libs-and-Cocoapods-tc8456.html
> > _______________________________________________
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> > aerogear-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/aerogear-dev
> >
> >
> >
> > --
> > Matthias Wessendorf
> >
> > blog: http://matthiaswessendorf.wordpress.com/
> > sessions: http://www.slideshare.net/mwessendorf
> > twitter: http://twitter.com/mwessendorf
> > _______________________________________________
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> > aerogear-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/aerogear-dev
>
>
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>



-- 
Matthias Wessendorf

blog: http://matthiaswessendorf.wordpress.com/
sessions: http://www.slideshare.net/mwessendorf
twitter: http://twitter.com/mwessendorf
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