How to test connection in swift

The best solution is you do not test but rather wait for the error to make a decision.

Testing if the user has a connection does not mean that after the test, his decision will be correct, because the connection may change status during the execution of the decision made, so you may fall into the same problem. >

Example with a pseudo code:

testConnection({ hasConnection in
  if hasConnection {
    getContentOnline()
  }
  else {
    getContentOffline()
  }
})

As you said, you do not need to test, you need to implement a fallback if the app fails to load the data and in this case you need to implement the - webView:didFailLoadWithError: method of UIWebViewDelegate .

Below are the reasons for failure or lack of data connection of the device, that you can handle them easily using a switch :

// assumindo que você receba um erro do callback webView:didFailLoadWithError
switch ([error code]){
  case NSURLErrorInternationalRoamingOff:
  case NSURLErrorCallIsActive:
  case NSURLErrorDataNotAllowed:
  case NSURLErrorNotConnectedToInternet:
  // Testar falha de rede com Reachabiity
  break;

  default:
  break;
}

If you received one of these codes, you can use Reachability to:

I use this approach a lot for practically everything networking, this keeps your app always responsive, fast and does not burden data and user time with testing.

Hope it helps, good coding.