how to search in table view in iphone - 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];
}