Hi Tony and Somu, I have an open radar for this one which has been outstanding for a few months.
Radar #32191242 Hope this helps. - Rod > On 15 Jun 2017, at 10:27 am, Tony Parker via swift-users > <swift-users@swift.org> wrote: > > Hi Somu, > > You can certainly file a bug for us. It may be something we are already > tracking or already fixed, but the bug report will let us double check that. > > Thanks, > - Tony > >> On Jun 13, 2017, at 12:33 PM, somu subscribe via swift-users >> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote: >> >> Thanks a lot Jordan for pointing out the root cause. >> >> The underlying executing and finished properties are readonly properties. >> >> For an Asynchronous operation I had to override it tell when the >> asynchronous operation completes. >> >> Since they are readonly properties I am unable to call the super on them to >> set values. >> >> I can still use String, was just wondering if there was a way to do it using >> KeyPath. It is more out of enthusiasm to try out the KeyPath feature in the >> project :) >> >> Would it be appropriate to file a bug report for the implementation of >> Operation ? >> >> Thanks and regards, >> Muthu >> >> >> >>> On 14 Jun 2017, at 1:32 AM, Jordan Rose <jordan_r...@apple.com >>> <mailto:jordan_r...@apple.com>> wrote: >>> >>> Hi, Muthu. This is a longstanding issue with Operation—the Objective-C name >>> of the property is just "executing", but the KVO keys that the implementors >>> used is "isExecuting". Swift isn't set up to deal with this difference. >>> >>> Fortunately, the base implementation of Operation already knows how to send >>> the KVO notifications, so you shouldn't have to override these properties >>> at all. If you still want to for some other reason, you can call super >>> instead of storing to a private property. >>> >>> Hope that helps, >>> Jordan >>> >>> >>>> On Jun 13, 2017, at 06:40, somu subscribe via swift-users >>>> <swift-users@swift.org <mailto:swift-users@swift.org>> wrote: >>>> >>>> Hi, >>>> >>>> I am having trouble using KeyPath to KVC (Key Value Code) in Swift 4. >>>> >>>> I have a subclass of Operation and I am overriding the isFinished and >>>> isExecuting property. >>>> >>>> Problem: >>>> - When I use KeyPath, the completionBlock of the operation is not invoked. >>>> - However when I use String instead of KeyPath, the completionBlock is >>>> invoked. >>>> >>>> Questions: >>>> - Am I missing something ? >>>> - Is there a way to fix it using KeyPath ? >>>> >>>> Code: >>>> >>>> override var isExecuting : Bool { >>>> >>>> get { >>>> return _executing //property in the class >>>> } >>>> >>>> set { >>>> willChangeValue(for: \.isExecuting) >>>> _executing = newValue >>>> didChangeValue(for: \.isExecuting) >>>> } >>>> } >>>> >>>> override var isFinished : Bool { >>>> >>>> get { >>>> return _finished //property in the class >>>> } >>>> >>>> set { >>>> willChangeValue(for: \.isFinished) >>>> _finished = newValue >>>> didChangeValue(for: \.isFinished) >>>> } >>>> } >>>> >>>> >>>> Configuration: >>>> - Xcode - 9.0 beta (9M136h) >>>> - Tested on Simulator (iOS 11) >>>> - macOS Sierra - 10.12.5 (16F73) >>>> >>>> >>>> Thanks and Regards, >>>> Muthu >>>> _______________________________________________ >>>> swift-users mailing list >>>> swift-users@swift.org <mailto:swift-users@swift.org> >>>> https://lists.swift.org/mailman/listinfo/swift-users >>>> <https://lists.swift.org/mailman/listinfo/swift-users> >>> >> >> _______________________________________________ >> swift-users mailing list >> swift-users@swift.org <mailto:swift-users@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-users > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users
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