iOS/iPhone Search Bar and Scope Bar (Objective-C , iPhone)

@interface ViewController : UIViewController  <UITableViewDataSource, UISearchBarDelegate,UISearchDisplayDelegate>

@property (nonatomic, retain) UISearchDisplayController	*searchDisplayController;

@end

//
//  ViewController.h
//  searchBarScopeApp
//
//  Created by Weerachai on 11/18/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController  <UITableViewDataSource, UISearchBarDelegate,UISearchDisplayDelegate>

@property (nonatomic, retain) UISearchDisplayController	*searchDisplayController;

@property (retain, nonatomic) IBOutlet UITableView *tableViewObj;

@end

//
//  ViewController.m
//  searchBarScopeApp
//
//  Created by Weerachai on 11/18/55 BE.
//  Copyright (c) 2555 Weerachai. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    NSMutableArray *allObject;
    NSMutableArray *displayObject;
    int Scope;
}

@end

@implementation ViewController

@synthesize searchDisplayController;

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.
    
    allObject = [[NSMutableArray alloc] init];
    [allObject addObject:@"1. One"];
    [allObject addObject:@"2. Two"];
    [allObject addObject:@"3. Three"];
    [allObject addObject:@"4. Four"];
    [allObject addObject:@"5. Five"];
    [allObject addObject:@"6. Six"];
    [allObject addObject:@"7. Seven"];
    [allObject addObject:@"8. Eight"];
    [allObject addObject:@"9. Nine"];
    [allObject addObject:@"10. Ten"];
    
    displayObject =[[NSMutableArray alloc] initWithArray:allObject];
    
    /*
	 set up the searchDisplayController programically
     */
    
    UISearchBar *mySearchBar = [[UISearchBar alloc] init];
	[mySearchBar setScopeButtonTitles:[NSArray arrayWithObjects:@"All",@"1 To 5",@"6 To 10",nil]];
	mySearchBar.delegate = self;
	[mySearchBar setAutocapitalizationType:UITextAutocapitalizationTypeNone];
	[mySearchBar sizeToFit];
	self.tableViewObj.tableHeaderView = mySearchBar;
    
    
	searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:mySearchBar contentsController:self];
	[self setSearchDisplayController:searchDisplayController];
	[searchDisplayController setDelegate:self];
	[searchDisplayController setSearchResultsDataSource:self];
    
	[mySearchBar release];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return displayObject.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    static NSString *CellIdentifier = @"Cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        // Use the default cell style.
        cell = [[[UITableViewCell alloc] initWithStyle : UITableViewCellStyleSubtitle
                                       reuseIdentifier : CellIdentifier] autorelease];
    }
    
    
    NSString *cellValue = [displayObject objectAtIndex:indexPath.row];
    cell.textLabel.text = cellValue;
    
    return cell;
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    
    if([searchString length] == 0)
    {
        [displayObject removeAllObjects];
        [displayObject addObjectsFromArray:allObject];
    }
    else
    {
        int i;
        i = 0;
        [displayObject removeAllObjects];
        switch (Scope)
        {
            case 0 : // All
                for(NSString * string in allObject)
                {
                    NSRange r = [string rangeOfString:searchString options:NSCaseInsensitiveSearch];
                    if(r.location != NSNotFound)
                    {
                        [displayObject addObject:string];
                    }
                }
                break;
                
            case 1 : // 1 To 5
                for(NSString * string in allObject)
                {
                    i = i + 1;
                    if(i>=1 && i<=6)
                    {
                        NSRange r = [string rangeOfString:searchString options:NSCaseInsensitiveSearch];
                        if(r.location != NSNotFound)
                        {
                            [displayObject addObject:string];
                        }
                    }
                }
                break;
                
            case 2 : // 6 To 10
                for(NSString * string in allObject)
                {
                    i = i + 1;
                    if(i>=6 && i<=10)
                    {
                        NSRange r = [string rangeOfString:searchString options:NSCaseInsensitiveSearch];
                        if(r.location != NSNotFound)
                        {
                            [displayObject addObject:string];
                        }
                    }
                }
                break;
        }
        
        
    }
    
    return YES;
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption{
    
    Scope = searchOption;
    
    [displayObject removeAllObjects];
    
    return YES;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)dealloc {
    [_tableViewObj release];
    [super dealloc];
}
@end

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption{
    
    Scope = searchOption;
    
    [displayObject removeAllObjects];
    
    return YES;
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
               case 1 : // 1 To 5
                for(NSString * string in allObject)
                {
                    i = i + 1;
                    if(i>=1 && i<=6)
                    {
                        NSRange r = [string rangeOfString:searchString options:NSCaseInsensitiveSearch];
                        if(r.location != NSNotFound)
                        {
                            [displayObject addObject:string];
                        }
                    }
                }