IOS swift convert dictionary to json string creates invalid JSON - json

Question

I have a json object which I receive from iOS api javascript callback and I will send the same json to php back end to validate it. In android everything works fine, but in IOS app the problem is when I receive the message.body which is json, it shows as below.
{
OrderNumber = 01869756;
"customer_key" = SLApO64gAktgmuLl;
"order_address" = "{\"address\":\"No. 7 Ogwui Road Enugu\",\"city\":\"Enugu\"}";
"order_amount" = 242550;
"order_currency" = "₦";
"order_currency_iso" = NGN;
"order_shipping" = 0;
"order_stores" = {
zOEZPU8sGCADHRbr8yw4 = {
amount = 242550;
currency = "₦";
delivery = 0;
total = 242550;
};
};
"order_subtotal" = 242550;
"order_subtotal_cent" = 24255000;
"order_tax" = "4123.35";
"order_tax_cent" = 412335;
"order_total" = "246673.35";
"order_total_cent" = 24667335;
status = 200;
}
When I pass the above IOS format to php backend json_decode($payload) it always return null. Please how do I convert this to real json format I have tried below code but it doesn't work?
let encoder = JSONEncoder()
if let jsonData = try? encoder.encode("\(message.body)") {
if let jsonString = String(data: jsonData, encoding: .utf8) {
print("dictFromJSON", jsonString)
}
}
And also I tried this
if let response = message.body as? Dictionary<String, AnyObject> {
let encoder = JSONEncoder()
if let jsonData = try? encoder.encode("\(response)") {
if let jsonString = String(data: jsonData, encoding: .utf8) {
print("dictFromJSON", jsonString)
}
}
}
But the above code output something like below which is not a valid json.
[
"OrderNumber": 01869756,
"customer_key": SLApO64gAktgmuLl,
"order_address": {\"address\":\"No. 7 Ogwui Road Enugu\",\"city\": \"Enugu\"};
"order_amount": 242550,
"order_currency": &#8358,
"order_currency_iso: NGN,
"order_shipping" = 0;
"order_stores": {
zOEZPU8sGCADHRbr8yw4 = {
amount = 242550;
currency = "₦";
delivery = 0;
total = 242550;
};
};
"order_subtotal": 242550,
"order_subtotal_cent: 24255000,
"order_tax": 4123.35,
"order_tax_cent": 412335,
"order_total": 246673.35",
"order_total_cent": 24667335,
"status" = 200
]

Answer 1

Since the type of message.body is __NSFrozenDictionaryM, you can turn it into a JSON string using JSONSerialization:
if let jsonData = try? JSONSerialization.data(withJSONObject: message.body, options: []) {
if let jsonString = String(data: jsonData, encoding: .utf8) {
print("dictFromJSON", jsonString)
}
}
If you want to see the JSON formatted prettily, pass .prettyPrinted to options:.
The JSONDecoder API does not work so well here as you are dealing with JSON in the form of a dictionary. JSONDecoder works best when you have Codable types.