How to convert json into dictionary for POST api call Swift - ios

Question

How to convert json into dictionary for POST api call Swift

Answer 1

info contains an array of object that have User and Address keys You need
let dict1 : [String:Any] = ["ID" : "User123", "Name" : "Virat", "UserID" : 0]
let dict2 : [String:Any] = ["city" : "Delhi", "pin" : 123]
let addressDict : [String:Any] = ["User" : dict1,"Address" : dict2]
let infoDict : [String:Any] = ["info" :[addressDict]]
To better understand look to
// MARK: - Empty
struct Empty: Codable {
let info: [Info]
}
// MARK: - Info
struct Info: Codable {
let user: User
let address: Address
enum CodingKeys: String, CodingKey {
case user = "User"
case address = "Address"
}
}
// MARK: - Address
struct Address: Codable {
let city: String
let pin: Int
}
// MARK: - User
struct User: Codable {
let id, name: String
let userID: Int
enum CodingKeys: String, CodingKey {
case id = "ID"
case name = "Name"
case userID = "UserID"
}
}
You can also use the models above and convert the model to Data with JSONEncodable

Answer 2

The issue is that you're adding user and address as separate dictionaries on the array.
The JSON you posted has an array for info key but its ONE dictionary with two keys.
You need to combine the address and user dicts into one declaration and then wrap that in an array.
For ex:
let dict1 : [String:Any] = ["ID" : "User123", "Name" : "Virat", "UserID" : 0]
let dict2 : [String:Any] = ["city" : "Delhi", "pin" : 123]
let dicts : [String:Any] = ["User": dict1, "Address" : dict2]
let arr = [dicts]
let infoDict : [String:Any] = ["info" : arr]
EDIT: I would agree with SH_Khan that a much better way of doing this would be to create a Codable model

Answer 3

The issue is you are make dictionary per object.
try this code:
let userDict : [String:Any] = ["ID" : "User123", "Name" : "Virat", "UserID" : 0]
let addressDict : [String:Any] = ["city" : "Delhi", "pin" : 123]
let infoDict : [String:Any] = ["info" : ["User": addressDict, "Address": addressDict]]

Answer 4

Try this:
func getDictionaryFromString(_ json: String) -> [String: Any]? {
if let data = json.data(using: .utf8) {
do {
return try JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
} catch {
print(error.localizedDescription)
}
}
return nil
}
override func viewDidLoad() {
super.viewDidLoad()
let json = """
{"info": [{
"User": {"ID": "user123",
"Name": "Virat",
"UserID": 0
},
"Address": {"city": "Delhi",
"pin": 123
}
}
]
}
"""
if let dict = getDictionaryFromString(json) {
print(dict["info"] as! NSArray)
}
}
//Printed:
> (
> {
> Address = {
> city = Delhi;
> pin = 123;
> };
> User = {
> ID = user123;
> Name = Virat;
> UserID = 0;
> };
> } )