On Nov 6, 2015, at 22:54 , Rick Mann <rm...@latencyzero.com> wrote: > > if var images = json["images"] as? [[String:AnyObject]]
No, that won’t work because Swift dictionaries have *value* semantics, so you’re *asking* for a copy here. The same thing in Obj-C works because the variable ‘images’ would be a reference. One possible solution would be to change this: > if var json = try NSJSONSerialization.JSONObjectWithData(data, options: > .MutableContainers) as? [String:AnyObject] to this: > if var json = try NSJSONSerialization.JSONObjectWithData(data, options: > .MutableContainers) as? NSMutableDictionary and stick to the realm of NS collection classes, but it’s pretty ugly. The other issue you have to be careful of is that casting a NSDictionary to (say) ‘[String: AnyObject]’ is probably going to copy the dictionary (to a real Dictionary) anyway, because this is a conversion (i.e. copy) cast, not a pure bridging cast. The only cast (AFAIK) from an object that’s a NSDictionary to Dictionary *without* a conversion is ‘[NSObject: AnyObject]’. This particular case, of working with Obj-C-derived NSJSONSerialization JSON objects in Swift, is actually really really hard. If the structure of the JSON object is fixed, it’s probably easier to define a Swift struct for it (or rather, a hierarchy of nested structs, dictionaries and arrays), and populate it once at the start and reconstruct the serialization dictionary at the end. _______________________________________________ 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
