Swift Create Json for API REST - ios

Question

I need create a json for send from a API REST:
{
"ownId": "seu_identificador_proprio",
"amount": {
"currency": "BRL",
"subtotals": {
"shipping": 1000
}
},
"items": [
{
"product": "Descrição do pedido",
"quantity": 1,
"detail": "Mais info...",
"price": 1000
}
],
"customer": {
"ownId": "seu_identificador_proprio_de_cliente",
"fullname": "Jose Silva",
"email": "nome#email.com",
"birthDate": "1988-12-30",
"taxDocument": {
"type": "CPF",
"number": "22222222222"
},
"phone": {
"countryCode": "55",
"areaCode": "11",
"number": "66778899"
},
"shippingAddress": {
"street": "Avenida Faria Lima",
"streetNumber": 2927,
"complement": 8,
"district": "Itaim",
"city": "Sao Paulo",
"state": "SP",
"country": "BRA",
"zipCode": "01234000"
}
}
}
I am confused with the creation..
I try begin with [NSObject:AnyObject]
var d1 : [NSObject:AnyObject] = ["ownId":"seu_identificador_proprio", "customer":""]
let dd1 = ["currency":"BRL"]
let dd2 = ["shipping":"1000"]
let arr = [d1]
let d = try! NSJSONSerialization.dataWithJSONObject(arr, options: NSJSONWritingOptions.PrettyPrinted)
let s = NSString(data: d, encoding: NSUTF8StringEncoding)! as String
print(s)
But I need help!

Answer 1

I have updated your code and added some hints, how can you build the above listed structure. Happy coding!
// Do not use NSObject as key's type
// Keys in a dictionary are usually Strig in every language
var d1: [String: AnyObject] = ["ownId":"seu_identificador_proprio", "customer":""]
// Define the type of your dictionaries, if you dont, in this case it will create a [String:String] dictionary, but you need to insert an array into it
// Make it a var, so you can mutate the container
var dd1: [String: AnyObject] = ["currency":"BRL"]
// Here the type is undefined. Try inserting anything else than String, and see the results
let dd2 = ["shipping":"1000"]
dd1["subtotals"] = dd2
d1["amount"] = dd1
// Build all your dictionaries like i did above, and at the end add all of them into arr
let arr = [d1]
// Do not force try any throwing function in swift - if there is an error, your application will crash
// Use proper error handling - https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/ErrorHandling.html
do {
let d = try NSJSONSerialization.dataWithJSONObject(arr, options: NSJSONWritingOptions.PrettyPrinted)
let s = NSString(data: d, encoding: NSUTF8StringEncoding)! as String
print(s)
} catch {
// Do your error handling here
}