URLRequest(url: webURL!) is returning NIL

Question

I am just starting on IOS/SWIFT and I am running though some basic tasks...

I have seem to run across an issue I can not figure out nor understand the issue.

I want to display the webpage in my web view but the optional value is returning NIL but holds a value line before...

    if let address = webSite {
        let webURL = URL(string: address) //webURL=="google.com" at this point 
        let urlRequest = URLRequest(url: webURL!)
        webView.loadRequest(urlRequest)
    }

urlRequest is NILL after trying the URLRequest..even tho webURL holds a value of "google.com" Which then results in the loadRequest crashing with the error

"Thread 1: Fatal error: Unexpectedly found nil while unwrapping an Optional value"

I believe I understand the concept of the optional value that it will return NILL if it holds no value but I can produce the value of "google.com" at URL call.

Try `http://google.com`. Your current url is not actually a valid url, so `webURL` is `nil`. — EmilioPelaez, Apr 12 '18 at 21:13
which line is actually causing the crash, are you sure the code you posted actually is related to the error? — luk2302, Apr 12 '18 at 21:14
I tried http:// - No difference. And the error is coming on the loadRequest because the var urlRequest is NILL — workingxx, Apr 12 '18 at 21:16
no, because `webView` is `nil`, `urlRequest` cannot even be `nil` . — luk2302, Apr 12 '18 at 21:20
you must use `http://www.google.com` and also config http in info.plist — mohsen, Apr 12 '18 at 22:19
you can check `if let x = y { } ` for handle your error when `URL` is nil — mohsen, Apr 12 '18 at 22:20
The reason is your webView is nil, please initialise the webView — Vinaykrishnan, Apr 13 '18 at 05:04

score 0 · Answer 1 · answered Apr 12 '18 at 21:15

Please unwrap optional webURL like below,

if let address = webSite, let webURL = URL(string: address) {
    let urlRequest = URLRequest(url: webURL)
    webView.loadRequest(urlRequest)
}

Also verify webView is properly initialized or connected in storyboard

score 0 · Answer 2 · answered Apr 12 '18 at 21:15

0

Its better to check whether URL is successfully created or not?. For your case it is for sure that URL(string: address) is not able to create a valid URL and force wnwrapping (putting ! mark) crashing the app.

Update your code as:

   if let address = webSite, let webURL = URL(string: address) {
        let urlRequest = URLRequest(url: webURL)
        webView.loadRequest(urlRequest)
    }

answered Apr 12 '18 at 21:15

Ankit Jayaswal

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This is still giving me a "Fatal error: Unexpectedly found nil while unwrapping an Optional value" on the loadRequest call – workingxx Apr 12 '18 at 21:46

URLRequest(url: webURL!) is returning NIL

2 Answers2