Advanced Swift: Error Handling, Episode 5: Handling Objective C Errors | Kodeco, the new raywenderlich.com

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1

App developers deal with errors from UIKit and other Objective-C libraries. Find out how they work with Swift.

This is a companion discussion topic for the original entry at https://www.kodeco.com/1940818-advanced-swift-error-handling/lessons/5
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Not entirely sure when it has changed, but it looks like catching an error with associated value as an NSError no longer loses the associated value.

enum FancyError: Error {
  case kazam(String)
}

do {
  throw FancyError.kazam("Help")
}
catch (let error as NSError) {
  dump(error)
}

Outputs:

- __lldb_expr_28.FancyError.kazam("Help") #0
  - super: NSError
    - super: NSObject