How to create JSON from a dictionary in Swift 4?

Question

Edit: I have read the other answers on SO for the same issue , however Im unable to get the desired output. I have tried many variations as suggested in other questions but

Answer 1

After trying out various ways the below way is what worked for me for getting the exact format required by the backend.

    var messageDictionary = [
        "sender":"system1@example.com",
        "recipients":["system2@example.com"],
        "data":[
            "text" : data
        ]
        ] as [String : Any]

        let jsonData = try! JSONSerialization.data(withJSONObject: messageDictionary)
        let jsonString = NSString(data: jsonData, encoding: String.Encoding.utf8.rawValue)

Answer 2

Now JSONEncoder can do the work easily.

let encoder = JSONEncoder()

encoder.outputFormatting = .prettyPrinted

let data = try encoder.encode(yourDictionary)

print(String(data: data, encoding: .utf8)!)

Answer 3

Additionally, you can just cast to String

let jsonData = try? JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted)
let jsonString = String(data: jsonData!, encoding: .utf8)