Hide the keyboard with type UIKeyboardTypeNumberPad objective c

In an iPhone app, I am having a UITextField which needs input as numerics, so I am passing the Keyboard type as UIKeyboardTypeNumberPad. It works but there is no return or Done button, so how can I hide the keyboard.

Code for reference is:

textDriverAge.delegate=self;
textDriverAge.keyboardType=UIKeyboardTypeNumberPad;
textDriverAge.clearButtonMode = UITextFieldViewModeWhileEditing;
[textDriverAge setReturnKeyType:UIReturnKeyDone];// UIReturnKeyNext];
textDriverAge.enablesReturnKeyAutomatically=TRUE;

I have handled the UITextfield events like:

- (BOOL)textFieldShouldReturn:(UITextField *)textField {


if(textDriverAge == textField)
{
    [textDriverAge resignFirstResponder];

    //[tglDropInDropOff becomeFirstResponder];
}

}

Guide me how to hide the keyboard.

you can use two types

1. Touch Method.

   use this link iOS dismissing keyboard, UILabel malfunction

in another choice add the UIToolbar in your view Controller.

- (void)viewDidLoad

{
[super viewDidLoad];

UIToolbar  *numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
numberToolbar.items = [NSArray arrayWithObjects:
                       [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad:)],
                       [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil],
                       [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad:)],
                       nil];
yourtextField.inputAccessoryView = numberToolbar;

 }


- (IBAction)cancelNumberPad:(UITextField*)textField
{
 [yourtextField resignFirstResponder];
    yourtextField.text=@"";
}


- (IBAction)doneWithNumberPad:(UITextField*)textField 
{
[yourtextField resignFirstResponder];
}