Forwarding keydown event to a search field

gistfile1.txt

- (void)goToProductListWithEvent:(NSEvent *)event
{
    self.selectedViewController = _productListViewController;
    
    [self.view.window makeFirstResponder:_productListViewController.searchField];
    _productListViewController.searchField.stringValue = [event characters];
    
    int64_t delayInSeconds = 0.01;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
      NSWindow *window = self.view.window;
    
      NSText *fieldEditor = [window fieldEditor:YES forObject:_productListViewController.searchField];
      [fieldEditor setSelectedRange:NSMakeRange(1, 0)];
      [_productListViewController updateFilter:_productListViewController.searchField];
    });
}