Open native Apps or open on Safari if don't have the App

gistfile1.m

- (void)openThisURL:(NSString *)launchUrl withFallback:(NSString *)fallback
{
    if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:launchUrl]]) {
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:launchUrl]];
    } else {
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:fallback]];
    }
}


// Usage
- (IBAction)didTouchOnButton:(UIButton *)sender
{
  [self openThisURL:@"twitter://user?screen_name=hebertialmeida" withFallback:@"https://twitter.com/hebertialmeida"];
}