Swift 2 & json post issue

Question

I am still fairly new to working with swift and json and I'm struggling with the following and getting an error message on the line: let param = jsonObj.dataUsingEncoding(NSUTF8StringEncoding). The error is:- value of type 'String : NSString' has no dataUsingEncoding

        let url = "{URLADDRESS/PHP FILE}"
        let request = NSMutableURLRequest(URL: NSURL(string: url)!)
        let session = NSURLSession.sharedSession()
        let jsonObj = ["usEmail":email, "usFullName":name, "usAddress":address, "usArea/District":area, "usPostTown":town, "usPostZip":zip, "usContactNum":number]

        request.HTTPMethod = "POST"

        request.addValue("application/json", forHTTPHeaderField: "Content-Type")
        request.addValue("application/json", forHTTPHeaderField: "Accept")

        do {
            let param = jsonObj.dataUsingEncoding(NSUTF8StringEncoding)
            request.HTTPBody = try NSJSONSerialization.dataWithJSONObject(jsonObj, options: [])
        } catch {
            print(error)
            request.HTTPBody = nil
        }

If anyone can assist me and tell what the problem is I would appreciate it very much.

Thanks

Answer 1

method .dataUsingEncoding is exist for String type, you have to make not a [String:NSString] dictionary, but a String. So you have do it like this:

result: XCode playground example

 let email = "@gmail"
 let  name = "Kostia"
 let address = "Home"
 let area = "UA"
 let town = "Kiev"
 let zip = "11111"
 let number = "123456"

 let stringJson = "{\"usEmail\":\"\(email)\",\"usFullName\":\"\(name)\",\"usAddress\":\"\(address)\",\"usArea/District\":\"\(area)\",\"usPostTown\":\"\(town)\",\"usPostZip\":\"\(zip)\",\"usContactNum\":\"\(number)\",}"
 let data = stringJson.dataUsingEncoding(NSUTF8StringEncoding)!
 do {
     let jsonObj = try NSJSONSerialization.JSONObjectWithData(data,      options: []) as? [String:String]
 } catch (let error as NSError) {
     print("ERROR be like: ", error)
 }