How does Error work in Swift in Xcode 8 beta 4
Seems like when converting our old code to beta 4, I keep casting Error to NSError. That will even lead sometimes to a warning "conditional cast from 'Error' to 'NSError' always succeeds". I feel like I'm not understanding how best to use Error. I want to get to thinks like error.code, error.localizedDescription... Is there good documentation or tutorials that explains these Error changes?
For example:
func webView(_ webView: UIWebView, didFailLoadWithError error: Error) {
Right now I'm doing something like:
if let error = error as? NSError {
if error.code == NSURLErrorCancelled {
But that gives the warning "Conditional cast from 'Error' to 'NSError' always succeeds"
Answer
Error is bridgeable to NSError in the same way that String is bridgeable to NSString. I.e (error as NSError) would work.
if (error as NSError).code == NSURLErrorCancelled {
// code
}