[iOS] ผมทำแอพ Dictionary พบปัญหาขั้นตอนการ Search ข้อมูลที่ได้มาไม่ตรงกัน มีโค้ดด้านในครับ

//
//  MasterViewController1.m
//  iTechDictionary
//
//  Created by MITR RAIPUTTA on 27/2/2556.
//  Copyright (c) พ.ศ. 2556 MITR2009. All rights reserved.
//

#import "MasterViewController1.h"

@interface MasterViewController1 ()

@end

@implementation MasterViewController1

@synthesize words,detail,filteredwords;





-(NSArray*) filteredWordsForSearchScope:(NSUInteger)scopeID
{
    NSPredicate *predicate;
    NSString *searchString = self.searchDisplayController.searchBar.text;
    switch (scopeID) {
        case 0:
            predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] %@",searchString];
            break;
        case 1:
            predicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@",searchString];
            break;
        default:
            break;
    }
    return [self.words filteredArrayUsingPredicate:predicate];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    NSInteger scopeID = controller.searchBar.selectedScopeButtonIndex;
    self.filteredwords = [self filteredWordsForSearchScope:scopeID];
    
    return YES;
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
    self.filteredwords = [self filteredWordsForSearchScope:searchOption];
    
    return YES;
    
}

-(NSArray *)arrayForTableView:(UITableView *)tableView
{
    if (tableView == self.searchDisplayController.searchResultsTableView)
    {
        return self.filteredwords;
    }else{
        return self.words;
    }
}


-(NSString *)filePath
{
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    return [[paths objectAtIndex:0] stringByAppendingPathComponent:@"DICTIONARY.db"];
}

-(void)openDB
{
    if (sqlite3_open([[self filePath] UTF8String],&db) != SQLITE_OK)
    {
        sqlite3_close(db);
        NSAssert(0,@"Database failed to open");
    }else{
        NSLog(@"database opend");
    }
}



- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    
    
    self.title = @"iTech General Programmer";
    words = [[NSMutableArray alloc]init];
    detail = [[NSMutableArray alloc]init];
    [self openDB];
    
    NSString *sql = [NSString stringWithFormat:@"SELECT * FROM generals"];
    sqlite3_stmt *statement;
    
    if(sqlite3_prepare_v2(db, [sql UTF8String], -1 , &statement, nil) == SQLITE_OK)
    {
        while (sqlite3_step(statement) == SQLITE_ROW) {
            char *field1 = (char *) sqlite3_column_text(statement, 1);
            NSString *field1Str = [[NSString alloc]initWithUTF8String:field1];
            
            char *field2 = (char *) sqlite3_column_text(statement, 2);
            NSString *field2Str = [[NSString alloc]initWithUTF8String:field2];
            
            NSString *str = [[NSString alloc]initWithFormat:@"%@", field1Str];
            NSString *str1 = [[NSString alloc]initWithFormat:@"%@",field2Str];
            
            
            [words addObject:str];
            [detail addObject:str1];
            
        }
    }
    
    
    [super viewDidLoad];
    
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [[self arrayForTableView:tableView]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];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }
    cell.textLabel.text = [[self arrayForTableView:tableView] objectAtIndex:indexPath.row];
    
    return cell;
    
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
        DetailViewController1 *detailViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailViewController1"];

        NSIndexPath *path = [self.tableView indexPathForSelectedRow];
       
    
        if([self.searchDisplayController isActive])
        {
            path = [self.searchDisplayController.searchResultsTableView indexPathForSelectedRow];
            detailViewController.wordDetail = [self.filteredwords objectAtIndex:path.row];
            detailViewController.detailDetail = [self.detail objectAtIndex:indexPath.row];
        มันน่าจะผิดแถวๆบรรทัดนี้น่ะครับ แต่ผมไปต่อไม่ถูกแล้ว หรือจะให้เปลี่ยนทิศทางโค้ดก็ได้ครับ ขอแค่มันถูกก็พอ
        
        }else{
            detailViewController.wordDetail = [words objectAtIndex:indexPath.row];
            detailViewController.detailDetail = [detail objectAtIndex:path.row];
        }
    [self.navigationController pushViewController:detailViewController animated:YES];    

}

@end