---
title: outputKeys
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/cifilter-swift.class/outputkeys
---

# outputKeys

The names of all output parameters from the filter.

## Declaration

```swift
var outputKeys: [String] { get }
```

## See Also

### Getting filter parameters and attributes

- [name](coreimage/cifilter-swift.class/name.md)
- [isEnabled](coreimage/cifilter-swift.class/isenabled.md)
- [attributes](coreimage/cifilter-swift.class/attributes.md)
- [inputKeys](coreimage/cifilter-swift.class/inputkeys.md)
- [outputImage](coreimage/cifilter-swift.class/outputimage.md)