[swift-users] dynamic requires @objc in Framework, but not in monolithic project

[Hooman Mehr]

When you create a new project in Xcode 9, the defaults for compiler settings are different. The errors you see are the result of running in full (strict) Swift 4.0 mode which has some such breaking changes.

> On Sep 13, 2017, at 3:56 PM, Rick Mann via swift-users <swift-users at swift.org> wrote:
> 
> I have an iOS app in which I'm factoring out code into a Framework. In Xcode 9 GM (Swift 4), the code builds fine when it's a monolithic app, but some of the files I've pulled into the framework are no longer compiling. One of the errors is:
> 
> Model.swift:471:14: 'dynamic' var 'dateCreated' must also be '@objc'
> 
> The class looks like:
> 
> import Foundation
> 
> class
> MPObject : NSObject
> {
>    ....
>    dynamic var	dateCreated : Date?
>    ....
> }
> 
> If I add @objc to each dynamic member, it seems to silence the errors, but the @objc should be implicit due to inheriting from NSObject, and as I said, it builds without error as a monolithic app.
> 
> -- 
> Rick Mann
> rmann at latencyzero.com
> 
> 
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