UISearchBar is not filtering UITableView - ios

Question

I'm trying to add a UISearchBar to a UITableView but the method TextDidBeginEditing is not being called. I think I am missing something simple but I can't figure it out.
Header File:
#interface TableViewController : UITableViewController <UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate>
#property (nonatomic, strong) NSMutableArray *initialCities;
#property (nonatomic, strong) NSMutableArray *filteredCities;
#property (nonatomic, strong) UISearchBar *searchBar;
#property BOOL isFiltered;
#end
Implementation File:
#import "TableViewController.h"
#interface TableViewController ()
#end
#implementation TableViewController
#synthesize initialCities, filteredCities, isFiltered, searchBar;
- (void)loadView
{
[super loadView];
searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, self.tableView.frame.size.width, 44.0)];
searchBar.delegate = self;
searchBar.autoresizingMask = (UIViewAutoresizingFlexibleWidth);
searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
self.tableView.tableHeaderView = searchBar;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.tableView.delegate = self;
initialCities = [[NSMutableArray alloc] initWithObjects:#"London", #"New York", #"Berlin", nil];
}
#pragma mark - UITableView DataSource Methods
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (isFiltered == YES)
{
return filteredCities.count;
}
else
{
return initialCities.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];
}
if (isFiltered == YES)
{
cell.textLabel.text = [filteredCities objectAtIndex:indexPath.row];
}
else
{
cell.textLabel.text = [initialCities objectAtIndex:indexPath.row];
}
return cell;
}
#pragma mark - UITableView Delegate Methods
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
#pragma mark - UISearchBar Delegate methods
- (void)searchBar:(UISearchBar *)searchBar TextDidBeginEditing:(NSString *)searchText
{
searchBar.showsCancelButton = YES;
if (searchText.length == 0)
{
isFiltered = NO;
}
else
{
isFiltered = YES;
filteredCities = [[NSMutableArray alloc] init];
for (NSString *cityName in initialCities)
{
NSRange cityNameRange = [cityName rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (cityNameRange.location != NSNotFound)
{
[filteredCities addObject:cityName];
}
}
}
[self.tableView reloadData];
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
[searchBar resignFirstResponder];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end
The result is that the search bar is displayed, the table view is displayed, but when I type text into the search bar the table view is not filtered. There is no crash. Any help is appreciated. Thank you.

Answer 1

Try this
-(void)searchBar:(UISearchBar*)searchBar textDidChange:(NSString*)searchText
{
// Your filter code
}
The method you implemented is not even present in Protocol
– searchBar:textDidChange:
– searchBar:shouldChangeTextInRange:replacementText:
– searchBarShouldBeginEditing:
– searchBarTextDidBeginEditing:
– searchBarShouldEndEditing:
– searchBarTextDidEndEditing:

Answer 2

(void)searchBar:(UISearchBar *)searchBar TextDidBeginEditing:(NSString *)searchText
This method is not existed in searchBar's delegate.
Use searchBarTextDidBeginEditing.

Answer 3

Go through this tutorial. well explained.
http://www.appcoda.com/search-bar-tutorial-ios7/
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"name contains[c] %#", searchText];
searchResults = [actualData filteredArrayUsingPredicate:resultPredicate];
}