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# requestState(for:)

Retrieves the state of a region asynchronously.

```
func requestState(for region: CLRegion)
```

## Parameters

`region`

The region with the state you want to know. This object needs to be an instance of one of the standard region subclasses that [`Core Location`](/documentation/CoreLocation) provides, such as [`CLCircularRegion`](/documentation/CoreLocation/CLCircularRegion) or [`CLBeaconRegion`](/documentation/CoreLocation/CLBeaconRegion). You can’t use this method to determine the state of custom regions you define yourself.

## Discussion

This method performs the request asynchronously and delivers the results to the location manager’s delegate. You must implement the [`locationManager(_:didDetermineState:for:)`](/documentation/CoreLocation/CLLocationManagerDelegate/locationManager(_:didDetermineState:for:)) method in the delegate to receive the results.

If the `region` parameter contains an unknown type of region object, this method does nothing. If a compatible iPad or iPhone app calls this method when running in visionOS, the method does nothing.

---

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