---
title: LAEnvironment.Observer
framework: Local Authentication
role: symbol
role_heading: Protocol
platforms: [iOS 18.0+, iPadOS 18.0+, Mac Catalyst 18.0+, macOS 15.0+, visionOS 2.0+, watchOS 11.0+]
path: localauthentication/laenvironment/observer
---

# LAEnvironment.Observer

## Declaration

```swift
protocol Observer : NSObjectProtocol
```

## Topics

### Instance Methods

- [environment(_:stateDidChangeFromOldState:)](localauthentication/laenvironment/observer/environment(_:statedidchangefromoldstate:).md)

## Relationships

### Inherits From

- [NSObjectProtocol](objectivec/nsobjectprotocol.md)