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# UIKit Functions

The UIKit framework defines a number of functions, many of them used in graphics and drawing operations.

## Topics

### Functions

[`UIDeviceOrientationIsLandscape(_:)`](/documentation/UIKit/UIDeviceOrientationIsLandscape(_:))

[`UIDeviceOrientationIsPortrait(_:)`](/documentation/UIKit/UIDeviceOrientationIsPortrait(_:))

[`UIDeviceOrientationIsValidInterfaceOrientation(_:)`](/documentation/UIKit/UIDeviceOrientationIsValidInterfaceOrientation(_:))

[`UIInterfaceOrientationIsLandscape(_:)`](/documentation/UIKit/UIInterfaceOrientationIsLandscape(_:))

[`UIInterfaceOrientationIsPortrait(_:)`](/documentation/UIKit/UIInterfaceOrientationIsPortrait(_:))

[`UIWritingToolsCoordinatorTextAnimationDebugDescription`](/documentation/UIKit/UIWritingToolsCoordinatorTextAnimationDebugDescription(_:))


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