SWIFT

convert data to json swift

do{  
let json = try JSONSerialization.jsonObject(with: data!, options: []) as? [String : Any]
}catch{ print("erroMsg") }

string to json swift

  let jsonText = "{"first_name":"Sergey"}"
        var dictonary:NSDictionary?
        
        if let data = jsonText.data(using: String.Encoding.utf8) {
            
            do {
                dictonary = try JSONSerialization.jsonObject(with: data, options: []) as? [String:AnyObject]
            
                if let myDictionary = dictonary
                {
                     print(" First name is: (myDictionary["first_name"]!)")
                }
            } catch let error as NSError {
                print(error)
            }
        }

convert json to json string ios swift

func jsonToString(json: AnyObject){
        do {
          let data1 =  try NSJSONSerialization.dataWithJSONObject(json, options: NSJSONWritingOptions.PrettyPrinted) // first of all convert json to the data
            let convertedString = String(data: data1, encoding: NSUTF8StringEncoding) // the data will be converted to the string
            print(convertedString) // <-- here is ur string  

        } catch let myJSONError {
            print(myJSONError)
        }

    }

convert json to json string ios swift

func jsonToString(json: AnyObject){
        do {
          let data1 =  try NSJSONSerialization.dataWithJSONObject(json, options: NSJSONWritingOptions.PrettyPrinted) // first of all convert json to the data
            let convertedString = String(data: data1, encoding: NSUTF8StringEncoding) // the data will be converted to the string
            print(convertedString) // <-- here is ur string  

        } catch let myJSONError {
            print(myJSONError)
        }

    }