Access array within an array of JSON response in swift? - arrays

Question

I'm trying to access an array response within array this is how I'm getting the friends array successfully
let url = URL(string: "http://xyz/api/get-friends-in-meetings")
AF.request(url!, method: .get, parameters: nil, encoding: JSONEncoding.default, headers: headers).responseJSON{ response in
switch response.result {
case .success:
let responseValue = response.value as! NSDictionary
let friends: [NSDictionary] = responseValue["friends"] as! [NSDictionary]
//here I want to store the "meeting array so that I can use it later"
break
case .failure(let error):
print(error)
break
}
}
This is the JSON response
{
"status": 0,
"message": "Friends found.",
"friends": [
{
"id": 24,
"name": "XYZ",
"email": "Z#Y.Z",
"meetings": [
{
"meeting_with": "X",
"meeting_person_screen_name": "Y",
"meeting_purpose": "Z",
}
]
}
]
}
how do I get the "meetings" array which is within the "friends" array? I have tried the same way as I did for friends but it show an error No exact matches in call to subscript

Answer 1

First you need to define these structs:
struct DataResult : Decodable {
let status: Int
let message: String
let friends: [FriendsResult]
}
struct FriendsResult : Decodable {
let id: Int
let name: String
let email: String
let meetings: [MeetingsResult]
}
struct MeetingsResult: Decodable {
let meeting_with: String
let meeting_person_screen_name: String
let meeting_purpose: String
}
So after that we need the JSON Example:
// Meetings
let meeting1: [String: Any] = [
"meeting_with": "X",
"meeting_person_screen_name": "Y",
"meeting_purpose": "Z"
]
// Friends
let friend1: [String: Any] = [
"id" : 24,
"name": "XYZ",
"email": "x#y.z",
"meetings": [meeting1]
]
let friend2: [String: Any] = [
"id" : 25,
"name": "John Doe",
"email": "jd#x.doe",
"meetings": [meeting1]
]
// Main JSON
let jsonExample: [String : Any] = [
"status": 0,
"message": "Friends found.",
"friends": [friend1, friend2]
]
Well, we continue to validate the JSON and decode to "DataResult":
let valid = JSONSerialization.isValidJSONObject(jsonExample)
if valid {
do {
let dataResult = try JSONSerialization.data(withJSONObject: jsonExample, options: JSONSerialization.WritingOptions())
let dataDecode = try JSONDecoder().decode(DataResult.self, from: dataResult)
let jsonString = String(data: dataResult, encoding: .utf8)
print("JSON: \(String(describing: jsonString))")
if dataDecode.friends.count > 0 {
// Get first friend you should use guard
let friend = dataDecode.friends[0]
let meeting = friend.meetings[0]
print("\(friend.name)")
print("\(meeting.meeting_with)")
}
}
catch let error {
print("ERROR: \(error.localizedDescription)")
}
}
else {
print("Invalid JSON")
}