Question

-(IBAction)clicked:(id)sender 
{ 
    NSString *productName=[NSStringstringWithFormat:@"%@",textfield.text];
    [cartArray addObject:productName];
    NSLog(@"Cart Array==%@",cartArray);
 }

-(void)viewDidLoad:(BOOL)animated {
    [super viewDidLoad:animated];
    cartArray = [[NSMutableArray alloc]init];
}

Answer 1

I assume If u have tableView and its datasource array is cartArray

-(IBAction)clicked:(id)sender 
{ 
  if(textfield.text.length>0)  
  {
   [cartArray addObject:textfield.text]; 
  }
  NSLog(@"Cart Array==%@",cartArray);

  //Now Reload tableView
  [yourTableView reloadData];
}