The user-calibrated latency for the current screen.
- iOS 13.0+
- Mac Catalyst 13.0+
- tvOS 13.0+
Use this property when you need to manually synchronize video playback with custom audio. For example, you might correlate this value with the
latency property of a Core Audio unit when writing custom video-playback software. The value of this property is
0 until the user explicitly calibrates their display.