The timestamp for the next frame to be rendered.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
If the renderer’s scene has any attached actions or animations, use this property to determine how long your app should wait before telling the renderer to draw another frame. If this property’s value matches that of the renderer’s
current property, the scene contains a continuous animation—schedule your next render at whatever time best maintains your app’s performance. If the value is infinite, the scene has no running actions or animations.