TealiumDataLayer | API Reference |Tealium Developer Docs

Class: `DataLayer`

The following summarizes the commonly used methods and properties of the iOS (Swift) DataLayer class.

Method/Property	Description
`add()`	Adds data to the data layer, based on expiration type.
`all`	Returns all data stored on the data layer.
`allSessionData`	Returns all data stored on the data layer for the active session.
`delete()`	Deletes the specified values from storage.
`deleteAll()`	Deletes all values from storage.
`persistentDataStorage`	Returns all event data stored in persistent storage.

Adds data to the data layer, based on expiration type. If the expiry parameter is not provided, the expiration type defaults to.session.

tealium?.dataLayer.add(key, value, expiry)

Returns all data stored on the data layer.

let data: [String: Any] = tealium?.dataLayer.all

Return Type	Description
`[String]`	All data stored on the data layer

Returns all data stored on the data layer for the active session.

let data: [String: Any] = tealium?.dataLayer.allSessionData

Return Type	Description
`[String]`	All data stored on the data layer for the active session

Deletes specified value from storage based on a specific key.

tealium?.dataLayer.delete(for key)

Parameter	Type	Description
`key`	`String`	Key of value to delete

To delete multiple values from storage based on multiple keys:

tealium?.dataLayer.delete(for keys)

Parameter	Type	Description
`keys`	`[String]`	Keys of values to delete

Deletes all values from storage.

tealium?.dataLayer.deleteAll()

Returns all event data stored in persistent storage.

let data: Set<DataLayerItem> = tealium?.dataLayer.persistentDataStorage

Return Type	Description
`Set<DataLayerItem>`	All event data stored in persistent storage