---
title: outputKeys()
framework: quartz
role: symbol
role_heading: Instance Method
path: quartz/qccomposition/outputkeys()
---

# outputKeys()

Returns an array listing the keys that identify the output ports of the root patch of the composition.

## Declaration

```swift
func outputKeys() -> [Any]!
```

## Return Value

Return Value An array of output keys.

## See Also

### Getting Port Keys

- [inputKeys()](quartz/qccomposition/inputkeys().md)