---
title: NSKeyValueSharedObservers
framework: foundation
role: symbol
role_heading: Class
path: foundation/nskeyvaluesharedobservers
---

# NSKeyValueSharedObservers

A collection of key-value observations which may be registered with multiple observable objects

## Declaration

```swift
class NSKeyValueSharedObservers
```

## Topics

### Initializers

- [init(observableClass:)](foundation/nskeyvaluesharedobservers/init(observableclass:).md)

### Instance Methods

- [addSharedObserver(_:forKey:options:context:)](foundation/nskeyvaluesharedobservers/addsharedobserver(_:forkey:options:context:).md)
- [snapshot()](foundation/nskeyvaluesharedobservers/snapshot().md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Classes

- [NSKeyValueObservation](foundation/nskeyvalueobservation.md)
- [NSKeyValueSharedObserversSnapshot](foundation/nskeyvaluesharedobserverssnapshot.md)