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# responds(to:)

Returns a Boolean value that indicates whether the receiving class responds to a given selector.

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

## Parameters

`aSelector`

A selector.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the receiving class responds to `aSelector` messages, otherwise <doc://com.apple.documentation/documentation/Swift/false>.

---

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