The time at which depth data for the frame (if any) was captured.
- iOS 11.0+
Face-based AR (see
ARFace) uses the front-facing, depth-sensing camera on compatible devices. When running such a configuration, frames vended by the session contain a depth map captured by the depth camera in addition to the color pixel buffer (see capturedImage) captured by the color camera. This property’s value is always zero when running other AR configurations.
The depth-sensing camera provides data at a different frame rate than the color camera, so this property’s value may not exactly match the
timestamp property for the image captured by the color camera, and can also be zero if no depth data was captured at the same time as the current color image.