살짝 다른 문법(?)

- ERROR 관련(?) 은  swift 2.0부터 syntax 가 바뀜

 * old

var err: NSError? var myJSON = NSJSONSerialization.JSONObjectWithData(data, options: .MutableLeaves, error:&err) as? NSDictionary if let parseJSON =myJSON { // Now we can access value of First Name by its key var firstNameValue = parseJSON[“firstName”] as? String println(“firstNameValue: \(firstNameValue)”) }

 * new(swift 2.0)

do {     if let parseJSON = try NSJSONSerialization.JSONObjectWithData(data!, options: .MutableContainers) as? NSDictionary {         // Now we can access value of First Name by its key         let firstNameValue:String = parseJSON["firstName"] as! String         print("firstNameValue: \(firstNameValue)")     }        } catch {     print(error) }

 - 결과 값에 optional 값이 같이 출력됨.(print)

명령어	결과값
print(“op :  \(option)")	op : optional(VALUE)
print(“op :  \(option)!”)	op :VALUE