preferredFramesPerSecond
The animation frame rate that the view uses to render its scene.
Declaration
var preferredFramesPerSecond: Int { get set }Discussion
SceneKit chooses an actual frame rate that is as close as possible to your preferred frame rate based on the capabilities of the screen the view is displayed on. The actual frame rate is usually a factor of the maximum refresh rate of the screen to provide a consistent frame rate. For example, if the maximum refresh rate of the screen is 60 frames per second, that is also the highest frame rate the view sets as the actual frame rate. However, if you ask for a lower frame rate, SceneKit might choose 30, 20, 15 or some other factor to be the actual frame rate. For this reason, you want to choose a frame rate that your app can consistently maintain.
The default value is 60 frames per second.