iOS Gradient Wheel

Quick answer：

An iOS Gradient Wheel typically refers to a circular interface element that uses gradient colors to indicate different states or values. It is a visual design feature often used in apps to provide a visually appealing and interactive user interface. Gradient wheels can be used to represent progress, settings adjustments, or other interactive elements where a range of values needs to be displayed. The technology behind it involves the use of UI components and programming techniques to create a seamless gradient effect that can be manipulated by the user.