---
title: objectWillChange
framework: CareKit
role: symbol
role_heading: Instance Property
platforms: [iOS 13.0+, Mac Catalyst 13.0+, watchOS 7.0+]
path: carekit/ockchartcontroller/objectwillchange
---

# objectWillChange

A publisher that publishes a contact when it changes in the store.

## Declaration

```swift
let objectWillChange: CurrentValueSubject<[OCKDataSeries], Never>
```

## See Also

### Configuring the Controller

- [store](carekit/ockchartcontroller/store.md)
- [storeManager](carekit/ockchartcontroller/storemanager.md)