Creating a JSON String from a Swift object in Xcode 7+ - swift2

Question

I have the following class that I need to convert into a JSON String using Xcode 7 and above. In the previous version of Xcode there was a JSONSerelization.toJson(AnyObject) function available, however does not appear in Xcode7 .
I need to convert the following class :
struct ContactInfo
{
var contactDeviceType: String
var contactNumber: String
}
class Tradesmen
{
var type:String = ""
var name: String = ""
var companyName: String = ""
var contacts: [ContactInfo] = []
init(type:String, name:String, companyName:String, contacts [ContactInfo])
{
self.type = type
self.name = name
self.companyName = companyName
self.contacts = contacts
}
I Have set up my test data as follows
contactType =
[
ContactInfo(contactDeviceType: "Home", contactNumber: "[phone]"),
ContactInfo(contactDeviceType: "Cell", contactNumber: "[phone]"),
ContactInfo(contactDeviceType: "Work", contactNumber: "[phone]")
]
var tradesmen = Tradesmen(type: "Plumber", name: "Jim Jones", companyName: "Jim Jones Plumbing", contacts: contactType)
Any help or direction would be appreciated.

Answer 1

I do not think that there is any direct way, even in previous Xcode. You will need to write your own implementation. Something like below:
protocol JSONRepresenatble {
static func jsonArray(array : [Self]) -> String
var jsonRepresentation : String {get}
}
extension JSONRepresenatble {
static func jsonArray(array : [Self]) -> String {
return "[" + array.map {$0.jsonRepresentation}.joinWithSeparator(",") + "]"
}
}
And then implement JSONRepresentable in your modals like below:
struct ContactInfo: JSONRepresenatble {
var contactDeviceType: String
var contactNumber: String
var jsonRepresentation: String {
return "{\"contactDeviceType\": \"\(contactDeviceType)\", \"contactNumber\": \"\(contactNumber)\"}"
}
}
struct Tradesmen: JSONRepresenatble {
var type:String = ""
var name: String = ""
var companyName: String = ""
var contacts: [ContactInfo] = []
var jsonRepresentation: String {
return "{\"type\": \"\(type)\", \"name\": \"\(name)\", \"companyName\": \"\(companyName)\", \"contacts\": \(ContactInfo.jsonArray(contacts))}"
}
init(type:String, name:String, companyName:String, contacts: [ContactInfo]) {
self.type = type
self.name = name
self.companyName = companyName
self.contacts = contacts
}
}