CODEWITHSUNDEEP
iosswiftxcode7nskeyedarchiver
Lavvo
Lavvo

Reputation: 1024

Xcode crashes with Unrecognized selector when trying to use NSKeyedArchiver.archiveRootObject

I have a custom Swift Class which writes data to the file system using NSKeyedArchiver. One of the functions in this class to do the job is:

func writeDataToArchive (data: AnyObject) {

    let dirPath = "\(currentPath)/\(fileName)"

    //----

    NSKeyedArchiver.archiveRootObject(data, toFile: dirPath)


}

I then call this function like so, by passing it a piece of data to save:

let dataToWrite: [NoteItem] = Hub.allNotes

metaData.writeDataToArchive(dataToWrite)

When I run my program, Xcode is crashing at this line

NSKeyedArchiver.archiveRootObject(data, toFile: dirPath)

with the following Error Message:

2015-10-12 05:25:39.949 MyApp[86437:4755070] *** NSForwarding: warning: object 0x7fe5ba5533c0 of class 'MyApp.NoteItem' does not implement methodSignatureForSelector: -- trouble ahead Unrecognized selector -[MyApp.NoteItem replacementObjectForKeyedArchiver:]

Based on the error message it seems to be an issue with something about trying to write my Custom Object to the device. When I use other standard Data Types like Int, String etc...they work fine, so it seems to be an issue with using a Custom Object. How do I fix this?

Upvotes: 1

Views: 1823

Answers (1)

Julian
Julian

Reputation: 2907

If you haven't already, make sure your object inherits from NSObject per this previous post.

Upvotes: 3

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