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

This will return a boolean for a URL's validity, or nil if an optional URL with a value of nil is passed.

extension URL {

    var isValid: Bool {
        get {
            return UIApplication.shared.canOpenURL(self)
        }
    }

}

Note that, if you plan to use a Safari view, you should test url.scheme == "http" || url.scheme == "https".