How to check validity of URL in Swift?

url swift ios8
clinton vansciver picture clinton vansciver · Jan 22, 2015 · Viewed 73.8k times · Source

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 I go about checking the validity using Swift?

Answer

3366784 picture 3366784 · May 8, 2015

If your goal is to verify if your application can open a URL, here is what you can do. Although safari can open the URL, the website might not exist or it might be down.

`// Swift 5
 func verifyUrl (urlString: String?) -> Bool {
    if let urlString = urlString {
        if let url = NSURL(string: urlString) {
            return UIApplication.shared.canOpenURL(url as URL)
        }
    }
    return false
}
`

As a side note, this does not check whether or not a URL is valid or complete. For example, a call that passes "https://" returns true.

Related questions

Swift. URL returning nil

I am trying to open a website in my app, but for some reason one line keeps returning nil, heres my code: let url = URL(string: "http://en.wikipedia.org/wiki/\(element.Name)")! if #available(iOS 10.0, *) { UIApplication.shared.open(url, …

Read More
encoding url using swift code

I need to send an URL in Arabic language, so I need to encode it before I put it in URL. I am using Swift code. Below is an example what i really need var s = "www.example.com/السلام عليكم" let …

Read More
How can I get query string values in JavaScript?

Is there a plugin-less way of retrieving query string values via jQuery (or without)? If so, how? If not, is there a plugin which can do so?

Read More