how to search in table view in iphone

Question

hi friend i get here some problem please me i want search string in table view by searchbar i create all function of searchbar then i call in viewdidload method but it not working why

i am creating NSMutableArray *tabledata; i am passing all value of app.journeylist in tabledata but it not wotking and application will be crash this is my controller class

//
//  TJourneylistController.m
//  Journey
//
//  Created by rocky on 3/17/11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#import "TJourneylistController.h"
#import "TAddNewJourney.h"
#import "TJourneyListCell.h"
#import "JourneyAppDelegate.h"
#import "TJourneyTabBar.h"
#import "global.h"
#import "TPastJourneyTabBar.h"
#import "NewJourney.h"
#import "TStartnewjourney.h"
#import "TMapViewController.h"
#import "TShareController.h"
#import "TSpeedometerController.h"
#import "TReviewsController.h"
#define DATABASE_NAME @"journey"
@implementation TJourneylistController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.leftBarButtonItem = self.editButtonItem;
    //self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(add_clicked:)];
    app = (JourneyAppDelegate *)[[UIApplication sharedApplication]delegate];
    sBar =[[UISearchBar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)]; 
    sBar.delegate=self;   
    [self.view addSubview:sBar];
    searcheddata =[[NSMutableArray alloc]init];
    tabledata =[[NSMutableArray alloc]init];     
    [tabledata addObject:app.journeyList];
    app.journeyList=[[NSMutableArray alloc]init]; 
    for(char c = 'A';c<='Z';c++)
        [app.journeyList addObject:[NSString stringWithFormat:@"%cTestString",c]];  //list = [app.journeyList retain];

}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 100.0;
}


#pragma mark -
#pragma mark Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    // Return the number of sections.
    return 2;
}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return [tabledata count];


}


// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    static NSString *CellIdentifier = @"Cell";


    TJourneyListCell *cell =(TJourneyListCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[TJourneyListCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
        NSLog(@"%@",cell);
    }
    NewJourney *newjoruneobject = [app.journeyList objectAtIndex:indexPath.row];
    switch (indexPath.section) {
        case 0:

            cell.namelbl.text = newjoruneobject.journeyname;
            cell.distancelbl.text = newjoruneobject.journeylocation;
            cell.infolbl.text     = newjoruneobject.journeydescription;
            cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
            break;
            case 1:
            cell.namelbl.text = @"Hello";

                break;

        default:
            break;
    }

    return cell;


}
#pragma mark UISearchBarDelegate 
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar 
{ 
    // only show the status bar’s cancel button while in edit mode 
    sBar.showsCancelButton = YES; 
    sBar.autocorrectionType = UITextAutocorrectionTypeNo; 
    // flush the previous search content 
    [tabledata removeAllObjects]; 
} 
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar 
{ 
    sBar.showsCancelButton = NO; 
}


- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText 
{ 
    [tabledata removeAllObjects];// remove all data that belongs to previous search 
    if([searchText isEqualToString:@""]|| searchText==nil){ 
        [myTableView reloadData]; 
        return; 
    } 
    NSInteger counter = 0; 
    for(NSString *name in app.journeyList) 
    { 
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init]; 
        NSRange r = [name rangeOfString:searchText]; 
        if(r.location != NSNotFound) 
        { 
            if(r.location== 0)//that is we are checking only the start of the names. 
            { 
                [tabledata addObject:name];
            } 
        } 
        counter++; 
        [pool release]; 
    } 
    [myTableView reloadData];
}




- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar 
{ // if a valid search was entered but the user wanted to cancel, bring back the main list content 
    [tabledata removeAllObjects]; 
    [tabledata addObjectsFromArray:app.journeyList];
    @try
    { 
        [myTableView reloadData];
    }
    @catch(NSException *e)
    { 
    } 
    [sBar resignFirstResponder];
    sBar.text = @""; 
} 

// called when Search (in our case “Done”) button pressed 
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar 
{ 
    [searchBar resignFirstResponder]; 
}



#pragma mark -
#pragma mark Table view delegate



- (void)dealloc {
    [super dealloc];
    //[self.tableView release];
    [mLable1 release];
    //[mLable2 release];
    //[mLable3 release];
    //[mLable4 release];
}


@end

Answer 1

Write this code into your .h file:

UISearchBarDelegate, UITableViewDelegate, UITableViewDataSource

IBOutlet UISearchBar *sbArray;
IBOutlet UITableView *tvData;

Write this code into your .m file:

- (void)viewDidLoad
{
    journeyList = [[NSMutableArray alloc] init];
    FinalList = [[NSMutableArray alloc] init];

    for(char c = 'A';c<='Z';c++)
        [journeyList addObject:[NSString stringWithFormat:@"%cTestString",c]];

    for(char c = 'A';c<='Z';c++)
        [FinalList addObject:[NSString stringWithFormat:@"%cTestString",c]];

    [tvData reloadData];
    [super viewDidLoad];
}

 (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [FinalList count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"anyCell"];

    if(cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"anyCell"] autorelease];
    }

    cell.textLabel.text = [FinalList objectAtIndex:indexPath.row];

    return cell;
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)search
{
    [search resignFirstResponder];
}

-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar 
{
    [searchBar resignFirstResponder];
}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
    FinalList = [[NSMutableArray alloc] init];

    if([sbArray.text isEqualToString:@""]|| searchText == nil)
    { 
        [tvData reloadData]; 
        return; 
    } 
    NSInteger counter = 0; 
    for(NSString *name in journeyList) 
    { 
        NSRange r = [name rangeOfString:sbArray.text]; 
        if(r.location != NSNotFound) 
        { 
            if(r.location== 0)//that is we are checking only the start of the names. 
            { 
                [FinalList addObject:name];
            } 
        } 
        counter++; 
    } 
    NSLog(@"Counter :- '%d'",[FinalList count]);

    [tvData reloadData];
}