Cashapelayer
CAShapeLayer is a special purpose CALayer subclass for drawing animatable shapes using cubic Bezier splines
Uiview
UIView is a class in the UIKit framework of iOS defines a rectangular area on the screen and the interfaces for managing the content in that area
Others
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You can use a bezier path either in a custom uiview w drawrect or easier with a cashapelayer whose curvature can be controlled via its control points from question Animate a curve in response to UIScrollView velocity |