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# splitViewControllerSupportedInterfaceOrientations(_:)

Asks the delegate to specify the interface orientations that the split view controller supports.

```
optional func splitViewControllerSupportedInterfaceOrientations(_ splitViewController: UISplitViewController) -> UIInterfaceOrientationMask
```

## Parameters

`splitViewController`

The split view controller.

## Return Value

The orientations that you want the specified split view controller to support. The value you return can be one or more of the [`UIInterfaceOrientationMask`](/documentation/UIKit/UIInterfaceOrientationMask) constants.

## Discussion

The split view controller calls this method to obtain the orientations that it supports. You can use this method to alter the set of orientations typically supported by a split view controller. If you don’t implement this method, the split view controller supports all orientations on iPad and all but the [`allButUpsideDown`](/documentation/UIKit/UIInterfaceOrientationMask/allButUpsideDown) orientation on iPhone devices.

## See Also

[`supportedInterfaceOrientations`](/documentation/UIKit/UIViewController/supportedInterfaceOrientations)

The interface orientations that the view controller supports.


---

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