SQlite Database ios UITableView -

i have change whole database...

now have 2 tables display below

first table:- category table

cat_id         categoryname  ====================================   1                  jesus   2                 buddha   3                billgates 

second table :- sayingtable

say_id    cat_id        sayings  =================================== 1          1         never false 2          1         god bless  3          1         boy 4          2         make peaceful world 5          2         never lie people 

and have used uitableview in firstview controller display below image

when click on jesus christ cell..or other cell crash..

my code below

firstviewcontroller.m

- (void)viewdidload {   dataaray = [[nsmutablearray alloc] init];;      [dataaray addobject:@"jesus christ"];     [dataaray addobject:@"budhdha"];     [dataaray addobject:@"billgates"];       jesus = [[nsmutablearray alloc] init];       buddha = [databaseoperation selectcategory:2];     buddha = [buddha valueforkey:@"saying"];     nslog(@"buddha bhagwan category=%@",buddha);      -(nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {     return [self.dataaray count]; }  -(uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     nsstring *identifier = @"cellidentifier";      uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:identifier];     if (cell==nil)     {         cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:identifier];         cell.textlabel.text = [dataaray objectatindex:indexpath.row];         cell.accessorytype = uitableviewcellaccessorydisclosureindicator;     }    return cell; }  -(void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {     detailviewcontroller *mydetail = [[detailviewcontroller alloc]   initwithnibname:@"detailviewcontroller" bundle:nil];     if ([[dataaray objectatindex:indexpath.row] isequal:@"jesus christ"])     {         mydetail.flag=1;        int selectedrow = (indexpath.row+1);                     jesus = [databaseoperation selectcategory:selectedrow];        jesus = [jesus valueforkey:@"saying"];         nslog(@"jesus category===%@",jesus);        mydetail.jesus2array = [jesus mutablecopy];   //note jesus2 array of detailviewcontroller     }    else if ([[dataaray objectatindex:indexpath.row] isequaltostring:@"budhdha"])     {         mydetail.flag=2;        selectedrow = (indexpath.row+1);       buddha = [databaseoperation selectcategory:selectedrow];        jesus = [jesus valueforkey:@"saying"];         nslog(@"jesus category===%@",jesus);         mydetail.buddha2array = [buddha mutablecopy]; //note jesus2 array of  detailviewcontroller     } 

detailviewcontroller.m

- (void)viewdidload {      nslog(@"flag value===%d",flag);      nslog(@"jesus 2 array===%@",jesus2array); } - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {     if (flag==1)     {         return [jesus2array count];     }    if(flag==2)     {           return [buddha2array count];     } - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *cellidentifier = @"cell";     uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:cellidentifier];     if (cell == nil)     {         cell = [[[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:cellidentifier] autorelease];  if (flag==1)     {        cell.textlabel.text = [jesus2array objectatindex:indexpath.row];     } 

databaseoperation.h

 #import <foundation/foundation.h>     #import "databaseoperation.h"     #import <sqlite3.h>      @interface databaseoperation : nsobject     {      }      +(void)check_create_database;     +(nsmutablearray*)selectcategory:(int)category_id; 

databaseoperation.m

 #import "databaseoperation.h"     #import <sqlite3.h>       static nsstring *dbpath;     static nsstring *databasename=@"message.sqlite";       @implementation databaseoperation       +(void)check_create_database     {         dbpath =[[nshomedirectory() stringbyappendingpathcomponent:@"documents"] stringbyappendingpathcomponent:databasename];          bool success;          nsfilemanager *fm=[nsfilemanager defaultmanager];         success=[fm fileexistsatpath:dbpath];         if(success){             return;         }         nsstring *dbpathfromapp=[[[nsbundle mainbundle] resourcepath] stringbyappendingpathcomponent:databasename];          nslog(@"dbpathfromapp = %@",dbpathfromapp);          [fm copyitematpath:dbpathfromapp topath:dbpath error:nil];     }     +(nsmutablearray*)selectcategory:(int)category_id     //+(nsmutablearray*)selectedcategory     {         sqlite3 *database;          nsmutablearray *dic=[[nsmutablearray alloc] init];          nsstring *saying;          if(sqlite3_open([dbpath utf8string] , &database) == sqlite_ok)         {             nsstring *sqltmp=[nsstring stringwithformat:@"select * sayingtable cat_id=%d",category_id];             const char *sqlstmt=[sqltmp utf8string];             sqlite3_stmt *cmp_sqlstmt;              if(sqlite3_prepare_v2(database, sqlstmt, -1, &cmp_sqlstmt, null)==sqlite_ok)             {                 while(sqlite3_step(cmp_sqlstmt)==sqlite_row)                 {                     nslog(@"sql statements====%s",sqlstmt);                          saying=[nsstring stringwithutf8string:(char *) sqlite3_column_text(cmp_sqlstmt, 2)];                          nsmutabledictionary *dicobj=[[nsmutabledictionary alloc] init];                          [dicobj setvalue:[nsstring stringwithformat:@"%@",saying] forkey:@"saying"];                          [dic addobject: dicobj];                    }             }              sqlite3_finalize(cmp_sqlstmt);           }         sqlite3_close(database); 

when click cell detailview controller not loading.....i don't know whats wrong in code please help..

thank you...