Thanks, Quincey. > That looks like Swift 3 code. The current version of the function is like > this: > >> @nonobjc func decodeObject(of classes: [AnyClass]?, forKey key: String) -> >> Any?
@nonobjc means this is Swift-specfic then? The init function I’m using is marked as @objc: @objc required init(coder decoder: NSCoder) { } > On 20 Dec 2017, at 01:25, Quincey Morris > <quinceymor...@rivergatesoftware.com> wrote: > > so you’d specify [NSArray.self, <something>.self] for the first parameter. > (Note, it’s a Swift-specific wrapper function, not just a direct API > translation.) > > You’ll have to figure out what type to use for the Ints. If they were > actually saved compatibly with Obj-C, the Ints will actually be NSNumbers, > and you’ll need to say “NSNumber.self”. If the Ints are stored opaquely as > Ints, I guess it would be Int.self. You should be able to figure out the > right type by trial and error, I’d say. > > (Actually, if the array itself was saved opaquely, then you’ll need something > like [[Int].self], I guess. This is an area subject to automatic bridging, so > what you get depends on the exact code used to encode the archive.) let array = decoder.decodeObject(of: [[Int].self], forKey: kArrayKey) as! [Int] gives an error: Cannot invoke 'decodeObject' with an argument list of type '(of: [[Int].Type], forKey: String)’ The code I mentioned in my follow-up email seems to work: let array = decoder.decodeObject(of: [NSArray.self], forKey: kArrayKey) as! [Int] Presumably as! would throw an exception if it’s not an array of Ints, so that does get checked (and using as? with a failable initializer would presumably be better). If I replace [NSArray.self] with [Array.self] I get an error: Ambiguous reference to member 'decodeObject(of:forKey:)’ I’ve also tried [Array<Int>.self], which gives a different error: Cannot invoke 'decodeObject' with an argument list of type '(of: [Array<Int>.Type], forKey: String)’ Jeremy _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com