ios - How to populate table view with large data -

i'm trying populate table view large data. however, tableview can display 20 string objects. how display rest of data , update table view each time user scrolls end?

var people = [people]() let configuresession = urlsessionconfiguration.default       let session = urlsession(configuration: configure)      //setup api key...     let apikey = "https://congress.api.sunlightfoundation.com/legislators?apikey=(//api key here...)"  if error != nil{                 print("error: \(error?.localizeddescription)")                 return             } else if let jsondata = data {                 do{                     let parsedjson = try jsonserialization.jsonobject(with: jsondata, options: []) as! [string: anyobject]                     guard let results = parsedjson["results"] as? [[string: anyobject]] else {return}                     result in results{                         let name = myclass() name.firstname = result["first_name"] as! string self.people.append(name) }                     dispatchqueue.main.async {                         //reload data                         self.table.reloaddata()                     }                 } catch let error nserror{                     print(error)                 }             } }).resume()     } }  func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {     return people.count }  func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell {          let cell = tableview.dequeuereusablecell(withidentifier: "cell")         cell.textlabel?.text = people[indexpath.row] //only displays 20... need display more!      return cell! }  func tableview(_ tableview: uitableview, willdisplay cell: uitableviewcell, forrowat indexpath: indexpath) {     let cell = tableview.dequeuereusablecell(withidentifier: "cell", for: indexpath)     //code display rest of data goes here?  } 

make sure return correct value in numberofrowsinsection method:

func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {     return mylargedata.count } 

with provided mylargedata array there should 30 rows in tableview