ios - Annoying TableView while using Twitter API -


hello making application using twitter api. have tablevviewcontroller, loads followers , people follow (friends). then, tableviewcontroller checks if friends our followers. if user user in friends array doesn't follow us, sent 'results' array , tableview loads data.but when scroll tableview, annoying things happens. here code , video link; click go video.

class tableviewcontroller: uitableviewcontroller { var results = nsmutablearray() var following = nsarray() var followers = nsarray() override func viewdidload() {     super.viewdidload()     tableview.delegate = self     tableview.reloaddata()     twitter.sharedinstance().apiclient.sendtwitterrequest(twitter.sharedinstance().apiclient.urlrequestwithmethod("get", url: "https://api.twitter.com/1.1/friends/ids.json", parameters: ["user_id":twitter.sharedinstance().session().userid], error: nil), completion: {(response:nsurlresponse?, data:nsdata?, error:nserror?) -> void in         var dic = nsjsonserialization.jsonobjectwithdata(data!, options: nsjsonreadingoptions.allowfragments, error: nil) as! nsdictionary         var friends = dic["ids"] as! nsarray         self.following = friends         twitter.sharedinstance().apiclient.sendtwitterrequest(twitter.sharedinstance().apiclient.urlrequestwithmethod("get", url: "https://api.twitter.com/1.1/followers/ids.json", parameters: ["user_id":twitter.sharedinstance().session().userid], error: nil), completion: {(resonse:nsurlresponse?,data:nsdata?,error:nserror?) -> void in             var dic = nsjsonserialization.jsonobjectwithdata(data!, options: nsjsonreadingoptions.allowfragments, error: nil) as! nsdictionary             var followers = dic["ids"] as! nsarray             self.followers = followers             id in self.following {                 if !self.followers.containsobject(id) {                     var st = id as! nsnumber                     twitter.sharedinstance().apiclient.loaduserwithid(st.stringvalue, completion: {(user:twtruser?,error:nserror?) -> void in                         self.results.addobject(user!)                         self.tableview.reloaddata()                         println("done")                     })                 }             }          })     })} override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     if indexpath.row == 0 {         var cell = tableview.dequeuereusablecellwithidentifier("cellid", forindexpath: indexpath) as! uitableviewcell         cell.textlabel?.text = "you have \(results.count) bad friends."         return cell     }else {         var cell = tableview.dequeuereusablecellwithidentifier("cellid", forindexpath: indexpath) as! customcell         var user = results.objectatindex(indexpath.row-1) as! twtruser         cell.user = user         cell.label.text = user.name         cell.imageframe.image = uiimage(data: nsdata(contentsofurl: nsurl(string: user.profileimagelargeurl)!)!)         return cell     }

as table view scrolls, cells re-used - object returned dequeuereusablecellwithidentifier may new cell or may object has been used - in case old content still there.

if have custom uitableviewcell subclass can implement prepareforreuse method in class clear old content or need set things in cellforrowatindexpath -

override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {      var cell = tableview.dequeuereusablecellwithidentifier("cellid", forindexpath: indexpath) as! customcell     if indexpath.row == 0 {         cell.textlabel?.text = "you have \(results.count) bad friends."         cell.user = nil         cell.label.text=""         cell.imageframe.image=nil          return cell     } else {         cell.textlabel?.text=""         cell.user = user         cell.label.text = user.name         cell.imageframe.image = uiimage(data: nsdata(contentsofurl: nsurl(string: user.profileimagelargeurl)!)!)         return cell     }     return cell }

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