objective c - expandable list view in iOS -


i need create expandable list view in ios app, ie. if tap on cell, should expand give more cells. i'm following example given on link: toggle showing/hiding child table cells ios code implementation file given here too: http://pastie.org/7756763

however, in example above arrays fixed. have sqlite database store tasks , start dates, among other things. need create expandable view different rows different start dates , when tap on date, should give tasks date. here's code:

- (void)viewdidload {     [super viewdidload];     alldates = [[nsmutablearray alloc]init];      self.date = [[nsmutablearray alloc] initwithobjects: nil];    // self.date = [[nsmutablearray alloc]init];     self.listofsections_datasource = [[nsmutablearray alloc]initwithobjects:nil];      sqlite3_stmt *statement;     const char *dbpath = [mdatabasepath utf8string];     if (sqlite3_open(dbpath,&mdiary)== sqlite_ok) {         nsstring *selectsql = [nsstring stringwithformat:@"select * todo"];         const char *query_stmt = [selectsql utf8string];         if (sqlite3_prepare_v2(mdiary,                                query_stmt, -1, &statement, null) == sqlite_ok)         {                     while(sqlite3_step(statement) == sqlite_row)             {                 temptaskname = [[nsstring alloc]initwithutf8string:(const char *) sqlite3_column_text(statement, 2)];                 [alldates addobject:[[nsstring alloc]initwithutf8string:(const char *) sqlite3_column_text(statement, 0)]];                  [self.date addobject:temptaskname];               }      }     sqlite3_finalize(statement); } sqlite3_close(mdiary);  nslog(@"%i",[alldates count]);          for(int x = 0;x < [alldates count];x++)         {             if (sqlite3_open(dbpath,&mdiary)== sqlite_ok) {                 nsstring *selectsql = [nsstring stringwithformat:@"select * todo"];                 const char *query_stmt = [selectsql utf8string];                  if (sqlite3_prepare_v2(mdiary,                                        query_stmt, -1, &statement, null) == sqlite_ok){             temp = [[nsmutablearray alloc]init];             while(sqlite3_step(statement) == sqlite_row)             {                 temptaskname = [[nsstring alloc]initwithutf8string:(const char *) sqlite3_column_text(statement, 2)];                 nslog(@"%@",temptaskname);                // [alldates addobject:[[nsstring alloc]initwithutf8string:(const char *) sqlite3_column_text(statement, 0)]];                 if([[[nsstring alloc]initwithutf8string:(const char *) sqlite3_column_text(statement, 0)] isequaltostring:alldates[x]])                 {                     [self.temp addobject:temptaskname];                 }                 }             nslog(@"task name%@",temp);             [listofsections_datasource addobject:temp];                  } sqlite3_finalize(statement);             }             sqlite3_close(mdiary);         }      //[self.listofsections_datasource addobject:alldates];     nsmutablearray *emptyarray = [[nsmutablearray alloc]init];    listofsections = [[nsmutablearray alloc]init];     (int = 0;i<[alldates count]; i++) {         [listofsections addobject:emptyarray];     }       self.selectedsection = -1;     self.selectedsectiontail = -1; }

the table view methods are:

- (nsinteger)numberofsectionsintableview:(uitableview *)tableview {       return [listofsections_datasource count];   } -(nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {      if(selectedsection !=section)         return 1;     else{         nsarray *array = [listofsections objectatindex:section];          return [array count];     }  } - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {      static nsstring *cellidentifier = @"cell";      if(self.selectedsection == indexpath.section){//this check see if section 1 touched          uitableviewcell *cell =  [tableview dequeuereusablecellwithidentifier:cellidentifier];         if (cell == nil)         {             cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:cellidentifier];         }          nsarray *myarray = [listofsections_datasource objectatindex:indexpath.section];//this contains cities         nsstring* mystring = [myarray objectatindex:indexpath.row]; // city row, under state          cell.textlabel.text = mystring;         return cell;     }     else{//this going happen first time         uitableviewcell *cell =  [tableview dequeuereusablecellwithidentifier:cellidentifier];         if (cell == nil)         {             cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:cellidentifier];         }              cell.textlabel.text = @"more";          return cell;     } }  - (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {       uitableviewcell * cell = [tableview cellforrowatindexpath:indexpath];      //check see if cell exapnding or selection     if([cell.textlabel.text isequaltostring:@"more"]){ // means need expand          listofsections = [[nsmutablearray alloc]init];         //setting list of section empty arrays          nsmutablearray *emptyarray = [[nsmutablearray alloc]init];         (int = 0;i<[alldates count]; i++) {             [listofsections addobject:emptyarray];         }          //add array of tasks here         [listofsections replaceobjectatindex:indexpath.section withobject:[listofsections_datasource objectatindex:indexpath.section]];           int tapedrow = [indexpath section];          self.selectedsection = tapedrow;          nsmutableindexset *myindexset = [[nsmutableindexset alloc]init];         [myindexset addindex:selectedsection];         [myindexset addindex:selectedsectiontail];          // updating section in tableview         if(selectedsectiontail!=-1)             [tasktable reloadsections:(nsindexset*)myindexset withrowanimation:uitableviewrowanimationfade];         else {             [tasktable reloadsections:[nsindexset indexsetwithindex:indexpath.section] withrowanimation:              uitableviewrowanimationfade];         }         //[tasktable reloaddata];     }     else{     }     selectedsectiontail = selectedsection; }

the problem here that: 1. no. of sections shows on screen correct when first cell tapped, disappears. 2. list doesn't expanded when of cells tapped.

please can me out? thanks..

this sample may you're looking for: http://developer.apple.com/library/ios/#samplecode/tableviewupdates/introduction/intro.html

the sample pulls static data, should able update use dynamic data db, , give tasks date, etc.


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