fatal error: NSArray element failed to match the Swift Array Element type

Question

Suddenly I\'v started getting run time error as,

fatal error: NSArray element failed to match the Swift Array Element type

I\'v declared my

Answer 1

Could it be a conflict between swift type and ObjectiveC's one? Because I experienced a similar situation trying to loop on a [NSMutableDisctionary] both with .forEach{} and for ... in way, but it gave me your same error (NSArray element failed to match the Swift Array Element type). When I changed the type to [Dictionary] all worked well. Now, [] was introduced in Swift, and types with prefix NS... in ObjectiveC.