Email subscription

≥ 1.20 Batch allows you to:

• Add and remove email address from a user profile. The profile will automatically be created if needed.
• Edit a profile's marketing subscription.

In order to set an email address and subscription status on a profile, the creation of a project is required. If no project is set up, any calls made for these actions will be ignored.

Here is how to set an email with a marketing subscription:

// This requires to have a custom user ID registered 
// or to call the `setIdentifier` method on the editor instance beforehand.
let editor = BatchUser.editor()
try? editor.setEmail("john.doe@batch.com") // Nil to erase. Addresses must be valid.
editor.setEmailMarketingSubscriptionState(.subscribed) // or .unsubscribed
editor.save()

If you call editor method before startWithAPIKey it will return nil. You should always call it after you started the SDK, and check nullity to be safe.