NSSortDescriptor evaluating ascending numbers (Swift)

Question

App has contentid coming in as a number string from a json file:

let contentid: AnyObject! = jsonFeed[\"contentid\"]

let stream:Dictionary = [
         


        

Answer 1

        let descriptor: NSSortDescriptor = NSSortDescriptor(key: "message_time", ascending: true)
        let sortedResults = arrayForMessages.sortedArray(using: [descriptor])
        print(sortedResults)