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# mapView(_:regionWillChangeAnimated:)

Tells the delegate when the region the map view is displaying is about to change.

```
optional func mapView(_ mapView: MKMapView, regionWillChangeAnimated animated: Bool)
```

## Parameters

`mapView`

The map view with the visible region that’s about to change.

`animated`

If <doc://com.apple.documentation/documentation/Swift/true>, the map view animates the change to the new region. If <doc://com.apple.documentation/documentation/Swift/false>, the map view makes the change immediately.

## Discussion

The framework calls this method at the beginning of a change to the map’s visible region.

## See Also

  [Location and Maps Programming Guide](https://developer.apple.com/library/archive/documentation/UserExperience/Conceptual/LocationAwarenessPG/Introduction/Introduction.html#//apple_ref/doc/uid/TP40009497)


---

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