无法将“数据”类型的值转换为预期的参数类型“数据”

Question

It was working fine before but somehow i am getting above error now while converting NSData to String . It showing me error on line number 2 ie

let jsonString = NSString(data: jsonData as Data, encoding: String.Encoding.utf8.rawValue) as! String 

It shows me error.

cannot convert value of type 'Data' to expected argument type 'Data'

OR

cannot convert value of type 'NSData' to type 'Data' in coercion

do{
        jsonData = try JSONSerialization.data(withJSONObject: para, options: JSONSerialization.WritingOptions()) as NSData
        let jsonString = NSString(data: jsonData as Data, encoding: String.Encoding.utf8.rawValue) as! String
        print("json array string best json request body = \(jsonString)")
        return jsonString

    } catch _ {
        print ("UH OOO")
        return nil
    }

Answer 1

Too much NS and too much as , just use the native Swift structs

jsonData = try JSONSerialization.data(withJSONObject: para)
let jsonString = String(data: jsonData, encoding: .utf8)