---
title: deltaDidChangeHandler
framework: gamecontroller
role: symbol
role_heading: Instance Property
path: gamecontroller/gcrelativeinput/deltadidchangehandler
---

# deltaDidChangeHandler

The block that the profile calls when the element’s input changes.

## Declaration

```swift
var deltaDidChangeHandler: ((any GCPhysicalInputElement, any GCRelativeInput, Float) -> Void)? { get set }
```

## Discussion

Discussion The block’s parameters are:

## See Also

### Getting the delta value and timestamp

- [delta](gamecontroller/gcrelativeinput/delta.md)
- [lastDeltaTimestamp](gamecontroller/gcrelativeinput/lastdeltatimestamp.md)
- [lastDeltaLatency](gamecontroller/gcrelativeinput/lastdeltalatency.md)