如何从Core Data获得分数的最大值？

Question

是否可以返回某个人的所有值并获得他们的最高分

let barScore: String = "9.246"

let numbers = [1, 6, 3, 9.245, 4, 6]

//numbers.minElement()
let value = numbers.maxElement()

if (Float(value!) < Float(barScore)) {

    print("True")

} else {

    print("False")
}

这样做很好，但似乎无法从核心数据中获得相同的效果。

let request = NSFetchRequest(entityName: "MeetResult")

        request.predicate = NSPredicate(format: "gymnast.fullName = %@", "\(gymnastNameText.text!)")

        do {

            let results = try AD.managedObjectContext.executeFetchRequest(request) as! [MeetResult]

            let value = results.maxElement()
            for result in results {

                print("Gymnast Name: \(gymnastNameText.text!)")
                print("Bar Score: \(result.barsScore!)")
            }

        } catch {

            fatalError("Falied to get results")

        }