How to check validity of URL in Swift?

Question

Trying to make an app launch the default browser to a URL, but only if the URL entered is valid, otherwise it displays a message saying the URL is invalid.

How would

Answer 1

In some cases it can be enough to check that the url satisfies RFC 1808. There are several ways to do this. One example:

if let url = URL(string: urlString), url.host != nil {
  // This is a correct url
}

This is because .host, as well as .path, .fragment and a few other methods would return nil if url doesn't conform to RFC 1808.

If you don't check, you might have this kind of messages in console log:

Task .<72> finished with error - code: -1002