---
title: "init(_:)"
framework: arkit
role: symbol
role_heading: Initializer
path: "arkit/arskeleton/jointname/init(_:)"
---

# init(_:)

Returns a joint name that corresponds to a key point defined in a human body pose.

## Declaration

```swift
init?(_ recognizedPointKey: VNRecognizedPointKey)
```

## Parameters

- `recognizedPointKey`: The argument key point.

## Discussion

Discussion This function matches human body key points defined by the Vision framework with joint names defined by ARKit. This function may return nil if the key point doesn’t map to a joint name. For more information about key points, see Detecting Human Body Poses in Images.

## See Also

### Creating a Joint Name

- [init(rawValue:)](arkit/arskeleton/jointname/init(rawvalue:).md)
- [VNRecognizedPointKey](vision/vnrecognizedpointkey.md)