Exception in UISearchBar - ios

Question

I'm trying to implement the searchBar following steps in this Video
But I got the following exception when I press the searchBar
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't do regex matching on object <Authors: 0x10960c1e0>.'
AuthorsTableViewController.h
#interface AuthorsTableViewController : UITableViewController <UISearchBarDelegate> {
NSMutableArray *authorsArray;
NSMutableArray *resultArray;
QuotesNavController *quotes;
}
#property (nonatomic, strong) IBOutlet UISearchBar *SearchBar;
#property (nonatomic, retain) NSMutableArray *authorsArray;
#property (nonatomic, retain) NSMutableArray *resultArray;
-(sqlite3 *) openDataBase;
-(IBAction)backToQuotes:(id)sender;
#end
AuthorsTableViewController.m
#import "AuthorsTableViewController.h"
#interface AuthorsTableViewController ()
#end
#implementation AuthorsTableViewController
#synthesize authorsArray, resultArray;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self retrieveDataFromSqlite];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
-(IBAction)backToQuotes:(id)sender{
[self performSegueWithIdentifier:#"backToQuotes" sender:sender];
}
-(sqlite3 *) openDataBase{
sqlite3 *database;
NSString *sqLiteDb = [[NSBundle mainBundle] pathForResource:#"SuccessQuotes" ofType:#"sqlite"];
if (sqlite3_open([sqLiteDb UTF8String], &database) != SQLITE_OK) {
NSLog(#"Failed to open database!");
}else{
NSLog(#"database opened!");
}
return database;
}
-(void) retrieveDataFromSqlite{
authorsArray = [[NSMutableArray alloc] init];
sqlite3 *myDatabase = [self openDataBase];
const char *sqlSelect = "SELECT *, COUNT(qu_author) AS count FROM authors JOIN quotes ON _auid = qu_author GROUP BY au_name ORDER BY au_name ASC";
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(myDatabase, sqlSelect, -1, &compiledStatement, NULL) == SQLITE_OK) {
while(sqlite3_step(compiledStatement) == SQLITE_ROW) {
int author_id = sqlite3_column_int(compiledStatement, 0);
NSString *au_name = [NSString stringWithUTF8String:(char *) sqlite3_column_text(compiledStatement, 1)];
NSString *au_picture = [NSString stringWithUTF8String:(char *) sqlite3_column_text(compiledStatement, 2)];
int quotes_id = sqlite3_column_int(compiledStatement, 3);
NSString *quotes_content = [NSString stringWithUTF8String:(char *) sqlite3_column_text(compiledStatement, 4)];
int quotes_author = sqlite3_column_int(compiledStatement, 5);
NSString *quotes_favorite = [NSString stringWithUTF8String:(char *) sqlite3_column_text(compiledStatement, 6)];
int count = sqlite3_column_int(compiledStatement, 7);
Authors *authors = [[Authors alloc] initWithUniqueId:author_id au_name:au_name au_picture:au_picture quotes_id:quotes_id quotes_content:quotes_content quotes_author:quotes_author quotes_author:quotes_author quotes_favorite:quotes_favorite count:count];
[authorsArray addObject:authors];
} // while end
}// prepare end
sqlite3_finalize(compiledStatement);
sqlite3_close(myDatabase);
}
- (void) searchThroughtData {
self.resultArray = nil;
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"SELF like[c] %#",[NSString stringWithFormat:#"%#*",self.SearchBar.text]];
self.resultArray = [[self.authorsArray filteredArrayUsingPredicate:resultPredicate] mutableCopy];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.tableView) {
return [authorsArray count];
} else {
[self searchThroughtData];
return [resultArray count];
}
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{
[self searchThroughtData];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"authorCell";
AuthorsTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[AuthorsTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
Authors *temp_items;
if (tableView == self.tableView) {
temp_items = [self.authorsArray objectAtIndex:indexPath.row];
}else{
temp_items = [self.resultArray objectAtIndex:indexPath.row];
}
[cell.authorName setText:[NSString stringWithFormat:#"%#",temp_items.au_name]];
[cell.count setTitle:[NSString stringWithFormat:#"%d",temp_items.count] forState:UIControlStateNormal];
UIImage *theImage = [UIImage imageNamed:temp_items.au_picture];
cell.authorPic.image = theImage;
UIView *customColorView = [[UIView alloc] init];
customColorView.backgroundColor = [UIColor colorWithRed:93/255.0
green:45/255.0
blue:22/255.0
alpha:0.5];
cell.selectedBackgroundView = customColorView;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
Authors *temp_items = [self.authorsArray objectAtIndex:indexPath.row];
quotes = [self.storyboard instantiateViewControllerWithIdentifier:#"QuotesNavController"];
quotes.quType = 3;
quotes.authorId = temp_items.author_id;
[self presentModalViewController:quotes animated:YES];
}
#end