rate the app

- (IBAction)rateButtonTapped:(UIButton *)sender {
    if (@available(iOS 10.3, *)) {
        [SKStoreReviewController requestReview];
    } else {
        NSURL *url = [NSURL URLWithString:@"itms-apps://itunes.apple.com/tw/app/swipedon-visitor-management/id986185962?l=en&mt=8"];
        [[UIApplication sharedApplication] openURL:url];
    }
}