parallax-effect | ‍️ Parallax effect in javascript using face | Computer Vision library

In the code that you have shared, one thing that I noticed is that you are using capital T in the enums .TiltAlongHorizontalAxis and .TiltAlongVerticalAxis, which don't compile (at least on Xcode 11.4.1) -> those need to be changed to lowercase T.

Apple's documentation for those enums is here.

Other than that, I don't see any problems with the code that you shared. In fact I created a sample project with a simple imageView in the view to which I added constraints so that it fills up the entire space of its superview.

I then added the motion effects code that you shared, and ran it on an actual device (iPad Pro). It worked perfectly.

Could you check a few things that might be a source of the problem:

• Double check that Settings > Accessibility > Motion > Reduce Motion is not turned on. Because if it is turned on, then UIInterpolatingMotionEffect won't work.
• Test that the accelerometer of the device that you are testing on actually works. Or better still, use another device to test it. (This won't work on the simulator).
• If you are editing the frame of the imageView in code anywhere (or especially in viewWillLayout / viewDidLayout), you shouldn't be doing that.

In any case, if none of these things help you to fix your problem, can you create a simple sample project which demonstrates the bug and post it on Github? I can try to help if I can actually reproduce the problem.