How to dismiss the Keyboard using UIsearchBar Delegate methods? i tried every method but no use.

Hi i am using a UIsearchBar in my app, i tried all methods in UISearchBar Delegate to dismiss the keyboard but no use. could anyone help me out.

some codes i tried

1.

-(void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
    [searchBar resignFirstResponder];
}

2.

-(BOOL) searchBar:(UISearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {

    if([text isEqualToString:@"\n"])
    {
        [searchBar resignFirstResponder];
        return NO;
    }
    return YES;

}

3.

- (void)searchBarCancelButtonClicked:(UISearchBar *) searchBar
{
     [searchBar resignFirstResponder];
}