Get light sensor value in iOS without private API?

Question

I need to get a concrete value from a sensor in lux . So no other substitute ways are appropriate for me, such as screen brightness.

It seems IOKit contains everything I need but it is private API and I will not be able to post my app on the app store.

So are there Apple-approved ways to get data from the light sensor? Or could you give a link to an official Apple documentation/official forum discussion where it is described that you can get light value via private API only?

Answer 1

我打开摄像机并解析每个帧的exif数据字典以获得亮度值。