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  Getting Started  Save, Fetch, Update and Delete  Core Data in Swift 5.0 Core Data is NOT an SQLite database. it is a graphical and persistence framework. CURD in swift (Create, Update, Retrieve, Delete) //MARK: -  Save  User Info Data func   addData ( user_name :  String ,  user_email :  String ,  user_dob :  String ,  imageData :  NSData ) {                   guard   let  appDelegate =  UIApplication . shared . delegate   as ?  AppDelegate   else  {              return          }          let  managedContext  = appDelegate. persistentContainer . viewContext          let  entity =  NSEntityDescription . entity ( forEntityName :  "UserInfo" ,  in : managedContext)!          ...

     func   callApi (){         let sessionConfig = URLSessionConfiguration . default         let sessionUrl = URLSession ( configuration : sessionConfig)         let url = URL ( string : "URL" )!         let request: URLRequest = URLRequest ( url :url)         let task = sessionUrl. dataTask ( with : request){             (data, response, error) in             if error != nil {                 print (error!. localizedDescription )             } else {                 do {                     if let json = try ! JSONSerialization . jsonObject ( with : data!, options : . allowFragments ) as ? [ Any ] {            ...