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# objc_AssociationPolicy

Type to specify the behavior of an association.

```
enum objc_AssociationPolicy
```

## Topics

### Enumeration Cases

[`objc_AssociationPolicy.OBJC_ASSOCIATION_ASSIGN`](/documentation/ObjectiveC/objc_AssociationPolicy/OBJC_ASSOCIATION_ASSIGN)

Specifies an unsafe unretained reference to the associated object.

[`objc_AssociationPolicy.OBJC_ASSOCIATION_COPY`](/documentation/ObjectiveC/objc_AssociationPolicy/OBJC_ASSOCIATION_COPY)

Specifies that the associated object is copied, and that the association is made atomically.

[`objc_AssociationPolicy.OBJC_ASSOCIATION_COPY_NONATOMIC`](/documentation/ObjectiveC/objc_AssociationPolicy/OBJC_ASSOCIATION_COPY_NONATOMIC)

Specifies that the associated object is copied, and that the association is not made atomically.

[`objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN`](/documentation/ObjectiveC/objc_AssociationPolicy/OBJC_ASSOCIATION_RETAIN)

Specifies a strong reference to the associated object, and that the association is made atomically.

[`objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC`](/documentation/ObjectiveC/objc_AssociationPolicy/OBJC_ASSOCIATION_RETAIN_NONATOMIC)

Specifies a strong reference to the associated object, and that the association is not made atomically.


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