In this blog post, we will identify some possible causes that could lead to the ns conversion error, and then identify some potential recovery methods that you can try to fix the problem.
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You can also convert any Swift
NSError , which is very useful even if the pattern is searched by code. Enabling options is pretty cool too!
let task = urlSession.Url) data task (with: write, _, error in Tab error Subsection .some (let error NSError) as location error .code == NSURLErrorNotConnectedToInternet: presenter.showOfflineView () .In some cases (leave a bug): presenter.showGenericErrorView () ... ... ... .If not: presenter.renderContent (from: data) task.resume ()
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I think the ability to convert
NSError is really hardcoded in the compiler and the current connection is implemented in the Swift runtime.
// This implements the description of the standard error object// kawhich type represents fixable errors in Spanish. it// Implementation is for interoperability with efficient Cocoa libraries// across:// - ...// - Allow native Swift error to slowly "convert" to NSError if// redirected to Cocoa, allowing inexpensive Swift interaction with Cocoa
/// The optional Take Error field converts it to a valid NSError instance.I wantswift :: _ swift_stdlib_bridgeErrorToNSError (SwiftError * errorObject) ... // Otherwise, compute all information related to domain, code and user, and Initialize // NSError. automatic value = SwiftError :: getIndirectValue (& errorObject); Truck type = errorObject-> getType (); automatic observation = errorObject-> getErrorConformance (); NSString * domain implies getErrorDomainNSString (value, witness); Type, law NSInteger = getErrorCode (value, witness); Type, NSDictionary * userInfo = getErrorUserInfoNSDictionary (value, witness); A type, ...
In the future, it should be possible to convert any Swift enumeration that matches
Error to a specific
NSError using the fully qualified key name as the key. men, and most importantly, as an enumerator, it converts the error code, as well as the payload, into operator data.
And this (I think) is at least part of the means validation where the information that
Error can still be converted to
NSError is protected ( probably more details):
Checks // if the containing type is existential // Error. So when it's related to NSError. if (type-> isExistentialWithError ()) possibly (auto nsErrorDecl = getNSErrorDecl ()) // The corresponding value type is Error. if (bridgedValueType) * bridgedValueType = getErrorDecl () -> getDeclaredInterfaceType (); Result nsErrorDecl-> getDeclaredInterfaceType ();
Please do not just say “encrypted message” and view the entire message received.
Import fundtypealias MyError = (Error?, Int) -> Voidlet myErrorBlock: MyError = error, number in and err let = error as NSError? // Work Print (error) if err let is equals error // This line never displays errors or warnings // fail because err is of type Error - not everyoneNSError Print (error) if let go = error how? NSError // -> Warning: Conditional conversion "Error?" to 'NSError' - binding transformation; did you want to try "how"? // issues cryptic warning about conversion error Print (error)
The second if-let will not fail, it will fail if your site tries to use ‘err’ like any ‘NSError’.
`let err = error as NSError?` means that if the possible error is actually an optional NSError AND nonzero, then set err if you want to use this NSError. Its type will soon be NSError.
This is slightly different if Swift’s conversion from `Error` to` NSError` was a successively successful replacement from `Error?` to As `nserror?`.
So the first error (in the form “Error?”) is a successful conversion “NSError?” “.
It then checks for zero and, if NSError cannot be zero, sets err to the specified uncompressed `NSError`.
You may need to take a close look at this if you want to know why `Error` to` NSError` still makes you an efficient bridge.
(Honestly, I don’t understand if all the suggestions in the article were absolutely necessary …)
In the third case, “Error?”
Błąd Konwersji Ns
Convertir L’erreur Ns
Errore Di Conversione Ns
Convertir Error Ns
Преобразование ошибки Ns
Erro De Conversão De Ns
변환 Ns 오류