Title did not appear on the DetailView after pressing the cell on MasterView, Why?

#import "MasterViewController.h"
#import "DetailViewController.h"
//"()" indicate defining private instance
/*
@interface MasterViewController ()

@property NSMutableArray *objects;
@end
*/
@implementation MasterViewController

- (void)awakeFromNib {
    [super awakeFromNib];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.titlesArray = [NSArray arrayWithObjects:@"1", @"1", @"2", @"3", @"4", @"5", @"6", @"7", @"8", @"9",
                        nil];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


#pragma mark - Segues
//sender is who generated the segue
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([[segue identifier] isEqualToString:@"showDetail"]) {
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        NSString *title = self.titlesArray[indexPath.row];
        [[segue destinationViewController] setDetailItem:title];
        //destanationViewController is the detailedViewController
    }
}

#pragma mark - Table View
//define number of section in the table
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}
//define number of row in each section
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.titlesArray.count;
}
//this method manage the table view
//cellForRowAtIndexPath return a cell for the table view
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //reuse cell to rotate each line in the table view
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath];

    //dose not reuse cell, it would alloc as many cell as the line that we have
    //UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseldentifier:@"Cell"];
//indexPath contain row and section
    NSString *object = self.titlesArray[indexPath.row];
    //[self.titlesArray objectAtIndex:indexPath.row];
    cell.textLabel.text = [object description];
    return cell;
}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return NO if you do not want the specified item to be editable.
    return YES;
}


@end