Calling this method is equivalent to calling rampToVideoZoomFactor:withRate: with a rate of zero. If a zoom transition is in progress, the transition slows to a stop (instead of stopping abruptly).
Before calling this method, you must call lockForConfiguration: to acquire exclusive access to the device’s configuration properties. If you do not, calling this method raises an exception. When you finish configuring the device, call unlockForConfiguration to release the lock and allow other devices to configure the settings.
The video zoom factor at which a dual camera device can automatically switch between cameras.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.