UISearchBar Text Not Updating List of File Names - ios

Question

In my class for my TableView, I populate the rows with the names of all files within a given folder of my app. I am just now changing it over to UISearchBar, and I'm having some issues with my logic. The search bar appears, but the tableview simply goes blank.
In my .h file I have:
#interface DevoSongs : UIViewController <UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate, UISearchResultsUpdating >{
NSArray *files;
NSIndexPath *thepath;
NSString *filenames;
NSArray *try2;
NSMutableArray *searchResults;
NSString *savedSearchTerm;
IBOutlet UITableView *tableView;
}
#property (nonatomic, retain) UITableView *tableView;
#property (strong, nonatomic) UISearchController *searchController;
#property (nonatomic, retain) NSArray *files;
#property (nonatomic, retain) NSString *filenames;
#property (nonatomic, retain) NSIndexPath *thepath;
#property (nonatomic, retain) NSArray *try2;
#property (nonatomic, retain) NSMutableArray *searchResults;
#property (nonatomic, copy) NSString *savedSearchTerm;
- (void)handleSearchForTerm:(NSString *)searchTerm;
#end
For my implementation:
-(void)viewDidLoad {
[super viewDidLoad];
self.searchController = [[UISearchController alloc]
initWithSearchResultsController:nil];
self.searchController.searchResultsUpdater = self;
self.searchController.dimsBackgroundDuringPresentation = NO;
self.searchController.searchBar.delegate = self;
self.tableView.tableHeaderView = self.searchController.searchBar;
self.definesPresentationContext = YES;
[self.searchController.searchBar sizeToFit];
}
- (void)viewWillAppear:(BOOL)animated {
NSBundle *bundle = [NSBundle mainBundle];
self.files = [bundle pathsForResourcesOfType:#"pdf" inDirectory:#"thepdfpowerpoints"];
NSString *documentsDirectoryPath = [self.files objectAtIndex:thepath.row];
self.title = #"Devo Songs";
self.filenames = [[documentsDirectoryPath lastPathComponent] stringByDeletingPathExtension];
NSMutableArray *names = [NSMutableArray arrayWithCapacity:[self.files count]];
for (NSString *path in self.files) {
[names addObject:[[path lastPathComponent] stringByDeletingPathExtension]];
}
self.files = [names sortedArrayUsingSelector:#selector(localizedCaseInsensitiveCompare:)];
self.tableView.delegate = self;
self.tableView.dataSource = self;
self.tableView.backgroundColor = [UIColor darkGrayColor];
self.view.backgroundColor = [UIColor grayColor];
[super viewWillAppear:animated];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of rows in the section.
if (self.searchController.isActive) {
return [searchResults count];
}
else {
return [self.files count];
}
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *filename = [[[self.files objectAtIndex:indexPath.row] lastPathComponent] stringByDeletingPathExtension];
NSInteger row = [indexPath row];
NSString *contentForThisRow = nil;
contentForThisRow = filename;
static NSString *CellIdentifier = #"CellIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
if( UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad ) {
[[cell textLabel] setText:contentForThisRow];
cell.textLabel.font = [UIFont fontWithName:#"Roboto-Bold" size:38];
cell.textLabel.textColor = [UIColor whiteColor];
cell.backgroundColor = [UIColor blackColor];
return cell;
}
else {
[[cell textLabel] setText:contentForThisRow];
cell.textLabel.font = [UIFont fontWithName:#"Roboto-Bold" size:22];
cell.textLabel.textColor = [UIColor whiteColor];
cell.backgroundColor = [UIColor darkGrayColor];
return cell;
}
}
- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope{
[self updateSearchResultsForSearchController:self.searchController];
}
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController{
NSString *searchString = self.searchController.searchBar.text;
NSPredicate *resultPredicate;
resultPredicate = [NSPredicate predicateWithFormat:#"SELF contains[c] %#",searchString];
searchResults = [self.files filteredArrayUsingPredicate:resultPredicate];
NSLog(#"results %lu", (unsigned long)[self.files count]);
[self.tableView reloadData];
}

Answer 1

Remove below code or comment below
- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope{
[self updateSearchResultsForSearchController:self.searchController];}
Added the another searchController delegate method in your called show below.
- (BOOL)searchBar:(UISearchBar *)searchBar shouldChangeTextInRange (NSRange)range replacementText:(NSString *)text {
[self updateSearchResultsForSearchController:self.searchController];}
This should work. Hope it help :)