SuggestionMenu

gistfile1.m

//I've made sugMenu instance variable and initialized it.
sugMenu = [[SuggestionMenu alloc] initWithSortedArray:array];
        
//make sure you are implementing UITextFieldDelegate protocol
-(void)textFieldDidBeginEditing:(UITextField *)textField{
    [sugMenu suggestForText:@"" inField:textField];
    
}
//easy as that...
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    NSString *rightText = [NSString stringWithFormat:@"%@%@",textField.text,string];
    [sugMenu suggestForText:rightText inField:textField];
    return YES;
}