Dismiss keyboard by touching background of view

http://stackoverflow.com/questions/2321038/dismiss-keyboard-by-touching-background-of-uitableview

UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];
[self.view addGestureRecognizer:gestureRecognizer];

[gestureRecognizer release];

- (void) hideKeyboard {
    [textfield1 resignFirstResponder];
    [textfield2 resignFirstResponder];
}