Solution of intensity configurable vibrations.

[Nyanki0427]

The key is to use UIImpactFeedbackGenerator.

My demo:

import objc_util, time
feedback = objc_util.ObjCClass('UIImpactFeedbackGenerator').new()
feedback.initWithStyle(0)
for I in range(0, 9):
    feedback.impactOccurred()
    time.sleep(0.1)

This demo will generate "impact feedback" with rhythm.

Another way is to use AudioToolbox.h C API. I learned from this topic, but I found another system sound IDs to perform different intensities.

AudioServicesPlaySystemSound(1519);
AudioServicesPlaySystemSound(1520);
AudioServicesPlaySystemSound(1521);

Where 1519 and 1520 are the same feedbacks when you use 3D touch, 1521 is a 3 combo light vibrate.

[william26445]

@Nyanki0427 thanks for this, really helped me figure out where I was wrong

[Nikolina]

That worked for me as well!