This decoder will only decode classes that adopt NSSecureCoding

Question

From AppDelegate i call this:

-(void)application:(UIApplication *)application handleWatchKitExtensionRequest:(NSDictionary *)userInfo reply:(void (^)(NSDictionary *))reply{

    [SavedSearchesHack getAllMatches:^(MatchCollection * _Nonnull matchCollection) {
        reply(@{@"response" : matchCollection});
    }];
}

And then i get this error when calling the reply:

*** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'This decoder will only decode classes that adopt NSSecureCoding. Class 'Test.MatchCollection' does not adopt it.'

    public class func openParentApplication(userInfo: [NSObject : AnyObject], 
    reply: (([NSObject : AnyObject], NSError?) -> Void)?) -> Bool

As long as i return simply objects like "test" instead of a MatchCollection i get no error.

Possible duplicate of [Parse and watchkit extension](http://stackoverflow.com/questions/30366934/parse-and-watchkit-extension) — Larme, Jul 26 '16 at 12:05
Do you ever read and try [Parse and watch kit extension](http://stackoverflow.com/questions/30366934/parse-and-watchkit-extension) and [When to use NSSecureCoding](http://stackoverflow.com/questions/17301769/when-to-use-nssecurecoding) — Pierre Charpentier, Aug 01 '16 at 10:16
Generally, you can decode objects that only adhere to `NSCoding` but not `NSSecureCoding` using the technique from this answer: https://stackoverflow.com/a/68522427/10601702. (Doesn't work for this question though, because they don't seem to control **how** their data is decoded) — Noah Nuebling, Jul 25 '21 at 21:19

score 12 · Answer 1 · answered Apr 08 '20 at 13:47

12

add in .h file

 // just the protocol

@interface PacketH: NSObject<NSSecureCoding>

add in .m file

+ (BOOL)supportsSecureCoding {
   return YES;
}

answered Apr 08 '20 at 13:47

dengApro

3,848
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score 1 · Answer 2 · answered Jan 03 '22 at 22:47

1

If you are using Swift, you need to implement NSSecureCoding protocol to your class:

class Foo: NSObject, NSSecureCoding {
    static var supportsSecureCoding: Bool {
       return true
    }
}

answered Jan 03 '22 at 22:47

pableiros

14,932
12
99
105

This decoder will only decode classes that adopt NSSecureCoding

2 Answers2

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