I tried stacking 30 RAW exposures of 1 second each, but the quality is far inferior to the 30-second long exposure in night mode.
How can I implement the 30-second long exposure of the built-in night mode?
These are the Developer Forums, where developers of apps for Apple's platforms ask each other for hints and tips on coding.
Your question is more of a product support one, so I'd suggest you ask it over at the Apple Support Forums. Thanks.