iphone - Search bar filter not working -

i creating search bar filter pragmatically, sadly not working. believe missing minor detail.the table view working correctly not search bar filter.i not using story board nor xib files project.

.h

  uisearchbar *searchbar;   nsmutablearray * getterms;   @property (strong, nonatomic) nsmutablearray* alltabledata;   @property (strong, nonatomic) nsmutablearray* filteredtabledata;   @property (nonatomic, retain) uitableview *tableview;   @property (nonatomic, assign) bool isfiltered; 

.m

-(void)viewdidload{     searchbar.delegate = self; searchbar = [[uisearchbar alloc] initwithframe:cgrectmake(30, 10, 750, 31)]; searchbar.placeholder = @"search";  //place holder searchbar.backgroundcolor = [uicolor whitecolor]; searchbar.autocorrectiontype = uitextautocorrectiontypeno; searchbar.backgroundcolor = [uicolor clearcolor]; searchbar.keyboardtype = uikeyboardtypedefault; self.navigationitem.titleview = searchbar; searchbar.layer.cornerradius = 5; searchbar.layer.maskstobounds = yes;     uitableview *tableview = [[uitableview alloc] initwithframe:cgrectmake(10.0, 10.0, 1000.0, 200.0) style:uitableviewstyleplain]; self.tableview = tableview; [self.view addsubview:tableview]; self.tableview.datasource = self;    }      -(void)searchbar:(uisearchbar*)searchbar textdidchange:(nsstring*)text    { if(text.length == 0) {     isfiltered = false; } else {     isfiltered = true;     filteredtabledata = [[nsmutablearray alloc] init];      (food* food in alltabledata)     {         nsrange namerange = [food.name rangeofstring:text options:nscaseinsensitivesearch];         nsrange descriptionrange = [food.description rangeofstring:text options:nscaseinsensitivesearch];         if(namerange.location != nsnotfound || descriptionrange.location != nsnotfound)         {             [filteredtabledata addobject:food];         }        }      }      [self.tableview reloaddata];      }      - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {  static nsstring *mycellidentifier = @"mycellidentifier";  uitableviewcell *cell = [self.tableview dequeuereusablecellwithidentifier:mycellidentifier];  if (cell == nil)     cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstylesubtitle reuseidentifier:mycellidentifier];  food* food; if(isfiltered)     food = [filteredtabledata objectatindex:indexpath.row]; else     food = [alltabledata objectatindex:indexpath.row];  cell.textlabel.text = food.name; cell.detailtextlabel.text = food.description;  return cell;  } - (nsinteger)numberofsectionsintableview:(uitableview *)tableview { return 1; }      - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section { int rowcount; if(self.isfiltered)     rowcount = filteredtabledata.count; else     rowcount = alltabledata.count;  return rowcount;  } 

searchbar.delegate = self;  

is before searchbar allocation. move below:

searchbar = [[uisearchbar alloc] initwithframe:cgrectmake(30, 10, 750, 31)]; searchbar.delegate = self;