CODEWITHSUNDEEP
iosswiftnsdatanskeyedarchiver
Deepak Sharma
Deepak Sharma

Reputation: 6581

[__SwiftValue encodeWithCoder:]: unrecognized selector sent to instance

I am trying to archive a dictionary using the following code and getting error. Obviously there is something is wrong in the response dictionary I am passing but the trace doesn't tell anything. How do I nail down the root cause?

do {
    let data = try NSKeyedArchiver.archivedData(withRootObject: response, requiringSecureCoding: false)
} catch {
    NSLog("Unable to archive  \(error)")
}

Error:

2019-07-17 19:08:38.978954+0530 MyApp-Swift[372:16845] Unable to archive  Error Domain=NSCocoaErrorDomain Code=4866 "Caught exception during archival: -[__SwiftValue encodeWithCoder:]: unrecognized selector sent to instance 0x282995e00
    (
    0   CoreFoundation                      0x00000001ca149ebc  + 252
    1   libobjc.A.dylib                     0x00000001c9319a50 objc_exception_throw + 56
    2   CoreFoundation                      0x00000001ca062b14  + 0
    3   CoreFoundation                      0x00000001ca14f7bc  + 1412
    4   CoreFoundation                      0x00000001ca15146c _CF_forwarding_prep_0 + 92
    5   Foundation                          0x00000001cabc4aa8  + 1276
    6   Foundation                          0x00000001caadc3b4  + 444
    7   Foundation                          0x00000001cab08ed8  + 964
    8   Foundation                          0x00000001cabc4aa8  + 1276
    9   Foundation                          0x00000001caadc3b4  + 444
    10  Foundation                          0x0000000

Upvotes: 2

Views: 2906

Answers (2)

Luca Schifino
Luca Schifino

Reputation: 71

Just complementing matt's answer, which is absolutely right.

In my case, I was using a Struct that conformed to Codable and, to make it work, I just encoded it to a Dictionary [String: Any].

Applying it to your code, it would be something like this:

do {
    let encodedResponse = (try? JSONSerialization.jsonObject(with: JSONEncoder().encode(response))) as? [String: Any] ?? [:]
    let data = try NSKeyedArchiver.archivedData(withRootObject: encodedResponse, requiringSecureCoding: false)
} catch {
    NSLog("Unable to archive  \(error)")
}

Upvotes: 1

matt
matt

Reputation: 535945

NSKeyedArchiver is for Cocoa Objective C objects only. Only NSCoding adopters can be archived with an NSKeyedArchiver. You would need an NSDictionary containing only NSCoding types. Well, you don’t have one.

Upvotes: 4

Related Questions