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Save dictionary array in user defaults swift how to#
Save dictionary array in user defaults swift code#

OSStatus tells us the status of the operation we just performed, and you will see it in all the keychain APIs. This parameter makes more sense when are retrieving items from the keychain, but if you wanted to return the item you just created to check its data or do anything else with it, you can use this parameter to return it after creating it. This is low level stuff, but I promise it will make sense later. The second parameter to this function is a UnsafeMutablePointer? which may contain the data created. You can specify optional attributes and optional return types as well. This should be stored as Data (or if you prefer, CFData). The actual data you want to hold, whether it is a plain password, or anything else.The item class, specified with the kSecClass key.Being an old (and low level) API, this argument is actually a CFDictionary.Īt the very least, the keychain item should have: The query specifies the data the keychain item will hold along with parameters we can use to find it - more on that later. The first parameter is a dictionary known as a query.

Again, these APIs are very old, so you may be surprised by what they take as arguments and what they return. To add items to the keychain, you use the SecItemAdd function. # import Security Adding Items to the Keychain Adding Items With that basic terminology out of the way, we can start doing basic operations: Adding new items to the keychain, searching for specific items, updating items, and deleting items.įirst things first, the keychain services are part of the Security framework, so don’t forget to add that import: If either of these change, the data becomes inaccessible. Please note that the keychain is tied to the developer provisioning profile used to sign the app and its bundle ID. The keychain offers classes for different common credentials, such as username/password pairs, a certificate, a generic password, and more.

Item Class: You can think of a class as a template of information you want to store.

Keychain Item: This is a registry in the keychain.

You can think of it is a database of sensitive information.

Keychain: The keychain is a secure and encrypted storage place for sensitive data.

Keep these concepts in mind as you read through this article: Basic Keychain Conceptsīefore we write some code, we need to get some terminology down. With that said, using the keychain isn’t too hard, and you should use it if you find yourself needing to store sensitive data.

Save dictionary array in user defaults swift code#

The keychain APIs are very old and as such we will be written some “ugly” Swift code to get everything to work, although these days it’s much easier to do the bridging to Core Foundation and back. The APIs are similar to the ones used in macOS, but the way both systems work with their keychain is different enough to consider them separate.

Save dictionary array in user defaults swift how to#

In this article we will explore how to use the iOS keychain (which is also applicable to iPadOS, watchOS, and even tvOS) using Swift.

You should not store this kind of data in UserDefaults, even if iOS has made it harder to access that data for normal users in the latest versions. As secure as iOS currently is, the keychain is the right place to store passwords, authentication tokens, and other sensitive data. The Keychain is the place where you would store sensitive data. Originally written in Objective-C, the old version has been archived but it is accessible here.

This article is an entirely rewritten version of an old tutorial I wrote years ago titled “Using the iOS Keychain”.