Using SwiftyJSON for subarray with Swift 3.1 - json

Question

I have a json data. I never use SwiftyJSON before. I am trying first time.
My json like this:
[
{
"Id": 1,
"Name": "A",
"SubNames": [
{
"SubId": 1,
"SubName": "A1"
},
{
"SubId": 2,
"SubName": "A2"
}]
},
{
"Id": 2,
"Name": "B",
"SubNames": [
{
"SubId": 1,
"SubName": "B1"
},
{
"SubId": 2,
"SubName": "B2"
}]
}
]
I can handle Name and append a array. But I can't handle SubNames. I tried somethings but doesn't work unfortunately. I want to append SubNames a array. This array will be like this:
[["A1","A2"],["B1","B2"]]
I use this code:
let json = JSON(data: data!)
for (_,subJson):(String, JSON) in json {
self.names.append(subJson["Name"].stringValue
}

Answer 1

try this to access those fields, and you shouldn't do data! here
guard let `data` = data else {
//no data handling
return
}
let dataArray = JSON(data: data).arrayValue
var arrayOfAllSubnames: [[String]] = [[]]
for object in dataArray {
var arrayOfSubnames: [String] = []
if let subnames = object["SubNames"].array {
for subname in subnames {
//here you get `"SubId": 2, "SubName": "B2"` object
let subnameValue = subname["SubName"].stringValue
arrayOfSubnames.append(subnameValue)
}
}
arrayOfAllSubnames.append(arrayOfSubnames)
}

Answer 2

Swift 3.0
1) First declare sub name array.
var subNameArray: [[String]] = []
2) you can access and store this objects as below.
let json = JSON(data: data!).arrayValue
for item in json {
var tempArray: [String] = []
let name = item["Name"].stringValue
for subNameItem in items["SubNames"].arrayValue {
tempArray.append(subNameItem["SubName"].stringValue)
}
subNameArray.append(tempArray)
}