UITimingCurveType.builtin
Use the built-in UIKit timing curves. Specify this value when you want to use one of the constants in the Animationcurve type. Specify the desired curve using the Cubictimingparameters property.
Declaration
case builtinUse the built-in UIKit timing curves. Specify this value when you want to use one of the constants in the Animationcurve type. Specify the desired curve using the Cubictimingparameters property.
case builtin