NSURLConnection Error Code -1100

Question

Created Sep ’17

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Hello,

I am trying to load content into UIWebView, and when testing in the simulator all I get is a white screen and the following error in the console:

NSURLConnection finished with error - code -1100

Can anybody help? My current Swift Code is:

class ViewController: UIViewController {
    @IBOutlet weak var webView: UIWebView!
  
    override func viewDidLoad() {
        super.viewDidLoad()
      
        webView.allowsInlineMediaPlayback = true;       
        webView.mediaPlaybackRequiresUserAction = false;
      
        webView.loadRequest(URLRequest(url: URL(fileURLWithPath: Bundle.main.path(forResource: "www/index", ofType: "html")!)))
      
        let statusBar = UIApplication.shared.value(forKeyPath: "statusBarWindow.statusBar") as? UIView
        statusBar?.backgroundColor = UIColor.clear
      
    }
}

Just to clarify, this code usual works for me. Many thanks.

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Answer 1

DTS Engineer OP

Apple

Sep ’17

Error -1100 is

NSURLErrorFileDoesNotExist

, which pretty much means what it says on the tin. It’s hard to say exactly what’s going on here but I have a bunch of concerns:

UIWebView, while not deprecated, has effectively been replaced by WKWebView. Why are you not using that?
WKWebView has a specific API for loading local content, namely,
```
loadFileURL(_:allowingReadAccessTo:)
```
. That API makes this whole process much more reliable.
The way you’re building your URL is kinda wonky:
- It’s better to work in ‘URL space’ and thus start with
```
url(forResource:withExtension:)
```
  rather than
```
path(forResource:ofType:)
```
  .
- You want to get the URL for
```
www
```
  and then create a relative URL to
```
index.html
```
  within that. That will ensure that relative references in the HTML go to the right place.

I recommend that you start by switching to WKWebView and see how things pan out from there.

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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware

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