archiveRootObject(_:toFile:) deprecated

Question

Hello,

I am new using NSCoding protocol. I understand how it works, but I don't know how to save and load the data. I've tried with NSKeyedArchiver.archiveRootObject(_:toFile:) and NSKeyedUnarchiver.unarchiveObject(withFile:), but I get a warning saying that they were deprecated. What method should I use?

Thank you!

Swift

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ivetacosta03

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Answer 1

You can use `NSKeyedArchiver.archivedData(withRootObject:requiringSecureCoding:)`, as suggested in the deprecation warning of `NSKeyedArchiver.archiveRootObject(_:toFile:)`.

(You may need to store the archived data.)

Also, `NSKeyedUnarchiver.unarchivedObject(ofClass:from:)` or `NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(_:)` for unarchiving.

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OOPer

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Answer 2

You can use `NSKeyedArchiver.archivedData(withRootObject:requiringSecureCoding:)`, as suggested in the deprecation warning of `NSKeyedArchiver.archiveRootObject(_:toFile:)`.

(You may need to store the archived data.)

Also, `NSKeyedUnarchiver.unarchivedObject(ofClass:from:)` or `NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(_:)` for unarchiving.

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OOPer

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Answer 3

I am new using
NSCoding
protocol.

Are you sure you should be using

NSCoding

at all. Most Swift programs use Swift’s

Codable

instead. There are good reasons to using

NSCoding

— for example, to archive an object graph with non-trivial connectivity — but if you don’t need to handle such cases then

Codable

is much easier.

Also, if you decide to stick with

NSCoding

, you really need to look at

NSSecureCoding

. All the standard uses cases for

NSCoding

can benefit from the security provided by

NSSecureCoding

.

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Apple Developer Relations, Developer Technical Support, Core OS/Hardware

let myEmail = "eskimo" + "1" + "@apple.com"

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eskimo

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archiveRootObject(_:toFile:) deprecated

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