save user id as login data permanently for iOS app with swift

Question

I've implemented a REST API Webservice and my iOS app creates requests to this webservice like a registration of an user. The REST webservice responses the user id if successful. A typical login is not a part of a REST webservice. Now I want to save this user id on the iPhone for this app, so I don't have to login everytime on starting the app. But how is it possible. How should I do this with swift? And what is the typical way to do this in an iPhone app?

Thanks!

You might want to check the [documentation for NSUserDefaults](https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSUserDefaults_Class/Reference/Reference.html) — zisoft, Sep 25 '14 at 19:05

score 0 · Accepted Answer · edited May 23 '17 at 12:05

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Is the "user id" you want to save need to be secret? If not that actually might be a good candidate for NSUserDefaults. If is needs to be secret use the Keychain.

For an example of using the Keychain from Swift see this: SO Answer

edited May 23 '17 at 12:05

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answered Sep 25 '14 at 19:07

zaph

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Yes the user id should be secret because of privacy. I use also https for all communications and maybe later TLS. – GRme Sep 25 '14 at 19:16
Added Keychain example link. – zaph Sep 25 '14 at 19:32

save user id as login data permanently for iOS app with swift

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