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- 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


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