iPhone restrict user from entering space in textfield

Question

i want to restrict user from entering space in a UITextField. for this i m using this code

- (BOOL)textField:(UITextField *)textField shouldChangeCharacters         


        

Answer 1

This will search to see if your replacement string contains a space, if it does then it throws the error message up, if it doesn't it returns YES.

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string 
{
    NSRange spaceRange = [string rangeOfString:@" "];
    if (spaceRange.location != NSNotFound)
    {
        UIAlertView *error = [[UIAlertView alloc] initWithTitle:@"Error" message:@"You have entered wrong input" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
        [error show];
        return NO;
    } else {
        return YES;
    }
}