@implementation ViewController
@synthesize name = _name ;
- (void)viewDidLoad
{
    [super viewDidLoad];
    int y = 20 ;
    for(int i=1; i <= 10; i++)
    {
      CGRect frame = CGRectMake(20, y, 100, 30 ) ;
      name = [[UITextField alloc] initWithFrame:frame];
      [name setTag:i] ;
      [name setBackgroundColor:[UIColor whiteColor]] ;
      [name addTarget:self action:@selector(makeBlue:) forControlEvents:UIControlEventTouchDown];
      [self.view addSubview:name];
      y += 38;
    }
}

- (void)makeBlue:(id)sender
{
    int i = (int)[sender tag] ;
    [name setTag:i] ;
    NSLog(@"%d", i);
    [name setBackgroundColor:[UIColor blueColor]] ;
}

- (void)viewDidLoad
{
[super viewDidLoad];

int y = 20 ;
for(int tag=1; tag <= 10; tag++)
{
    CGRect frame = CGRectMake(20, y, 100, 30 ) ;
    name = [[UITextField alloc] initWithFrame:frame];
    [name setTag:tag] ;
    [name setBackgroundColor:[UIColor whiteColor]] ;
    [name addTarget:self action:@selector(makeItSo:) forControlEvents:UIControlEventEditingDidEnd];
    [self.view addSubview:name];
    [name setDelegate:self] ;
    y += 38;
}
}

- (void)makeItSo:(id)sender
{
int tag = (int)[sender tag] ;
[name setTag:tag] ;
NSString * aName = [name text] ;
NSLog(@"%@", aName) ;
}

[self.view viewWithTag:<tag>]

- (void)makeBlue:(id)sender
{
    int tag = (int)[sender tag] ;
    UIView *tagView = [self.view viewWithTag:tag]
    [tagView setBackgroundColor:[UIColor blueColor]] ;
}

name = [self.view viewWithTag:[sender tag]];
 NSString *fieldText = name.text;

NSInteger i =    [sender tag];