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iosswiftxcodenskeyedunarchiver

NSKeyedUnarchiver.unarchiveTopLevelObjectWithData is obsoleted in Swift 4

I tried to implement a fork of AwesomeCache that implements unarchiveTopLevelObjectWithData in Swift 4:

if let data = NSData(contentsOfFile: path) {
    do {
        possibleObject = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data as NSData) as? CacheObject
    }
    catch {}
}

But Xcode is angry at me now, and says:

'unarchiveTopLevelObjectWithData' was obsoleted in Swift 4 (Foundation.NSKeyedUnarchiver)

Mean, imo, because it doesn't tell me what it's been replaced with (if anything?), and the documentation is rather... vacant.

So what do I use instead?

Solution

  • Agree with you, NSData is not Data, an improvement could be:

        if let nsData = NSData(contentsOfFile: path) {
        do {
            let data = Data(referencing:nsData)
            possibleObject = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data) as? CacheObject
        }
        catch {}
    }