Create JSON String from Array? - swift

Question

This might be an easy question, but how can I create a simple JSON String from an existing Array?
In the Documentation the only thing I found is:
class func JSONObjectWithData(_ data: NSData,
options opt: NSJSONReadingOptions,
error error: NSErrorPointer) -> AnyObject?
But I only want to create a simple JSON String from an existing Array.
With the existing Swift JSON Extensions I am only able to parse existing JSON Strings, and could not create a new String.
I could manually create the String, but there might be a better solution.
Any help would be greatly appreciated.

Answer 1

If you have a NSArray object, you could create your JSON String by using something like:
func JSONStringify(value: AnyObject, prettyPrinted: Bool = false) -> String {
var options = prettyPrinted ? NSJSONWritingOptions.PrettyPrinted : nil
if NSJSONSerialization.isValidJSONObject(value) {
if let data = NSJSONSerialization.dataWithJSONObject(value, options: options, error: nil) {
if let string = NSString(data: data, encoding: NSUTF8StringEncoding) {
return string
}
}
}
return ""
}
I found here the details for this function.
SWIFT 3
func JSON2String(jsonObj: AnyObject, prettyPrinted: Bool = false) -> String {
let options = prettyPrinted ? JSONSerialization.WritingOptions.prettyPrinted : []
if JSONSerialization.isValidJSONObject(jsonObj) {
if let data = try? JSONSerialization.data(withJSONObject: jsonObj, options: options) {
if let string = String(data: data, encoding: Task.StringEncoding) {
return string
}
}
}
return ""
}

Answer 2

Let's say you have an array of Strings called array. You would do this:
let array = [ "String1", "String2" ]
var error:NSError?
let data = NSJSONSerialization.dataWithJSONObject(array, options: NSJSONWritingOptions.allZeros, error: &error)
let str = NSString(data:data!, encoding:NSUTF8StringEncoding)
println("\(str!)")