Ios – Swift-3 error: ‘-[_SwiftValue unsignedIntegerValue]: unrecognized selector

exceptioniosswift3xcode

Following code was perfectly worked with old swift. This is an extension of String

func stringByConvertingHTML() -> String {
    let newString = replacingOccurrences(of: "\n", with: "<br>")
    if let encodedData = newString.data(using: String.Encoding.utf8) {
        let attributedOptions : [String: AnyObject] = [
            NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType as AnyObject,
            NSCharacterEncodingDocumentAttribute: String.Encoding.utf8 as AnyObject
        ]
        do {
            let attributedString = try NSAttributedString(data: encodedData, options: attributedOptions, documentAttributes: nil) //Crash here
            return attributedString.string
        } catch {
            return self
        }
    }
    return self
}

But in swift 3 it crashes saying

*** Terminating app due to uncaught exception
'NSInvalidArgumentException', reason: '-[_SwiftValue
unsignedIntegerValue]: unrecognized selector sent to instance
0x6080002565f0'

Anyone please suggest me what need to do?

Best Answer

I ran into the same problem:

let attributedOptions : [String: AnyObject] = [
            NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType as AnyObject,
            NSCharacterEncodingDocumentAttribute: String.Encoding.utf8 as AnyObject
        ]

Here the String.Encoding.utf8 the type check fails. Use NSNumber(value: String.Encoding.utf8.rawValue)

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A little extra testing, suggests that it's related to the optional object; [String: AnyObject] appears to work OK.

EDIT: And after all that, I decided to read the documentation, which says to use [String: Any]. :)

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