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# instancesRespond(to:)

Returns a Boolean value that indicates whether instances of the receiver are capable of responding to a given selector.

```
class func instancesRespond(to aSelector: Selector!) -> Bool
```

## Parameters

`aSelector`

A [Selector](https://developer.apple.com/library/archive/documentation/General/Conceptual/DevPedia-CocoaCore/Selector.html#//apple_ref/doc/uid/TP40008195-CH48).

## Return Value

[`YES`](/documentation/ObjectiveC/YES) if instances of the receiver are capable of responding to `aSelector` messages, otherwise [`NO`](/documentation/ObjectiveC/NO).

## Discussion

If `aSelector` messages are forwarded to other objects, instances of the class are able to receive those messages without error even though this method returns [`NO`](/documentation/ObjectiveC/NO).

To ask the class whether it, rather than its instances, can respond to a particular message, send to the class instead the  `NSObject` protocol instance method [`responds(to:)`](/documentation/ObjectiveC/NSObjectProtocol/responds(to:)).

## See Also

[`forwardInvocation:`](/documentation/ObjectiveC/NSObject-swift.class/forwardInvocation:)

Overridden by subclasses to forward messages to other objects.


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