How to implement hot search on tableView in iPhone

Keyword: Search bar, table view, iphone, ios, hot search, instant search, delegate, datasource, implement,

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       How to implement hot search on tableView in iPhone

You can download the source code from here

1)   Take a new project named TableSearch

2)  Add Table in viewController.xib named tbl;

3) Add a search bar named searchBar

4) Set UITableViewDataSource,UITableViewDelegate and UISearchBarDelegate to support Delegate methods.

4) Modify the code of ViewController.h (Modified code is in different color - brown )

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITableViewDataSource,UITableViewDelegate,UISearchBarDelegate,UITextFieldDelegate>

{

    NSMutableArray *tableArray; // stores all data 

    NSMutableArray *filterArray; // stores only searched data 

    NSMutableArray *displayArray; // shows data on table

}

@property (retain, nonatomic) IBOutlet UISearchBar *serchBar;

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

@end

4)Now modify the code of ViewController.m (Modified code is in different color - brown )

import "ViewController.h"

@implementation ViewController

@synthesize serchBar;

@synthesize tbl;

//

//

// Method to filter the data from total array with key, this method returns filtered array

//

//

-(NSMutableArray *)managingDisplayArrayFromArray:(NSMutableArray *)totalArray withKey:(NSString *)key

{

    NSMutableArray *ary=[[NSMutableArray alloc]init];

    key=[key lowercaseString];

    for (NSString *str in totalArray)

    {

      NSRange range = [str rangeOfString:key];

         if (range.location != NSNotFound )

             [ary addObject:str];

    

    }

    return ary;

}

// Implementation of textFiled delegate method

// This method will call on every type on text field of serach bar

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

    NSString *keyString=[textField.text stringByAppendingString:string];

    displayArray=[self managingDisplayArrayFromArray:tableArray withKey:keyString];

    [self.tbl reloadData];

    return YES;

}

// Implementation of searchBar delegate method

// This method will call on search button click

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar

{

    displayArray=[self managingDisplayArrayFromArray:tableArray withKey:serchBar.text];

    [self.tbl reloadData];

    [self.serchBar resignFirstResponder];

}

// Implementation of searchBar delegate method

// This method will call on cancle button click

-(void)searchBarCancelButtonClicked:(UISearchBar *) searchBar

{

    displayArray=tableArray;

    [self.tbl reloadData];

    [self.serchBar resignFirstResponder];

}

#pragma mark -- Implementation of table view delegate methods

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

{

    return [displayArray count];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

     UITableViewCell *cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"];

    [cell.textLabel setText:[displayArray objectAtIndex:indexPath.row]];

    return cell;

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    

    // Initializing the arrays

    

    tableArray=[[NSMutableArray alloc]init];

    displayArray=[[NSMutableArray alloc]init];

    [tableArray addObject:@"ram"];

    [tableArray addObject:@"shyam"];

    [tableArray addObject:@"suresh"];

    [tableArray addObject:@"girjesh"];

    [tableArray addObject:@"sudhir"];

    [tableArray addObject:@"aknsha"];

    [tableArray addObject:@"vineeta"];

    [tableArray addObject:@"rakesh"];

    [tableArray addObject:@"himanshu"];

    [tableArray addObject:@"barkha"];

    displayArray=[NSMutableArray arrayWithArray:tableArray];

    self.serchBar.showsCancelButton=YES;

    

  // Following 3 line of code is written to support text field of searchBar and also here we are setting  delegate of that text filed

    

    

    NSArray *subViewsArray=[self.serchBar subviews]; 

    UITextField *txtField=(UITextField *)[subViewsArray objectAtIndex:1];

    txtField.delegate=self;

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

- (void)dealloc {

    [serchBar release];

    [tbl release];

    [super dealloc];

}

@end

You can also download the code from here

Link for Source code http://adf.ly/FRVuX