NotificationCenter.ObservationToken

struct · iOS 26.0+ · SDK 27.1

struct ObservationToken

A unique token representing a single observer registration in a notification center. You receive the `ObservationToken` type as a return value from `addObserver(of:for:using:)` and related methods. Retain the `ObservationToken` for as long as you need to continue observation, since observation ends when the token goes out of scope. You can also explicitly stop observing by passing the token to ``removeObserver(_:)-(ObservationToken)``.

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This type has no directly callable members in this snapshot. See the framework’s skipped declarations for unsupported APIs.

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