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# region

The region on which events are triggered.

```
var region: CLRegion? { get set }
```

## Discussion

Use this property to set the region on which the location event is triggered. The region object must have at least one of <doc://com.apple.documentation/documentation/CoreLocation/CLRegion/notifyOnEntry> or <doc://com.apple.documentation/documentation/CoreLocation/CLRegion/notifyOnExit> set to <doc://com.apple.documentation/documentation/Swift/true>.

This property is `nil` when an application is not authorized for location services.

---

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