Set a row to uppercase on select of a tableview row

gistfile1.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
@synthesize strings;

- (void)viewDidLoad
{
    [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
    strings = [NSMutableArray arrayWithObjects:@"abc",@"def",@"ghi",nil];
}

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


#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [strings count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    
    static NSString *identifier = @"StringCell";
    UITableViewCell *cell;
    
    cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
    }
    cell.textLabel.text = [strings objectAtIndex:indexPath.row];
    return cell;
}

#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [strings replaceObjectAtIndex:indexPath.row withObject:[[strings objectAtIndex:indexPath.row] uppercaseString]];    
    [tableView reloadData];
}

@end