display search result in table view in objective-c - ios

Question

I've created a table view with search bar in my View Controller, but the table view doesn't show the search result.
This is how my code working. First i create an Array to hold data >> display the array data in table view >> using search bar to filter the table view.
Here is my code :
- (void)viewDidLoad {
[super viewDidLoad];
self.inventoryarray =[[NSArray alloc] initWithObjects: #"apple",#"samsung",#"HTC",#"LG",#"Sony",#"Motorola",#"Nexus",#"Asus" ,nil];
self.searchresult =[[NSArray alloc]init];
// Do any additional setup after loading the view, typically from a nib.
}
#pragma table View methods
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (tableView == self.searchDisplayController.searchResultsTableView) {
return [self.searchresult count];
} else {
return [self.inventoryarray count];
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *simpleTableIdentifier = #"CellID";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
if (tableView == self.searchDisplayController.searchResultsTableView) {
cell.textLabel.text = [self.searchresult objectAtIndex:indexPath.row];
} else {
cell.textLabel.text = [self.inventoryarray objectAtIndex:indexPath.row];
}
return cell;
}
#pragma search methods
-(void) filterContentForSearchText:(NSString *)searchText scope:(NSString *)scope
{
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"SELF contains[cd] %#", searchText];
self.searchresult = [self.inventoryarray filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
[self filterContentForSearchText:searchString scope:[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]] ;
return YES;
}

Answer 1

you forget to refesh data on table
-(void) filterContentForSearchText:(NSString *)searchText scope: (NSString *)scope
{
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"SELF contains[cd] %#",
searchText];
self.searchresult = [self.inventoryarray filteredArrayUsingPredicate:resultPredicate];
// you forget to reload Data
[self.searchDisplayController.searchResultsTableView reloadData];
// else use
[yourtableView reloadData];
}
suggestion : UISearchDisplayController is deprecated, use UISearchController on onwards, for tutorial

Answer 2

You need to only [tableView reloadData]; in last of filterContentForSearchText method.
if you wan't to use UISearchController then...
- 'UISearchDisplayController' is deprecated: first deprecated in iOS 8.0 - UISearchDisplayController has been replaced with UISearchController
if you don't want to use UISearchController then use below method:
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {} and reload tableview.