sprintWithDamping/initialSpringVelocity not working?

[Stefan Walkner]

Expected Behavior

when setting usingSpringWithDamping and initialSpringVelocity it seems as if they have no effect; no spring animation at all... Am I missing something?

Actual Behavior

E.g. the zoom animation is linear, the view grows - but now springin

Steps to Reproduce the Problem

1. setting usingSpringWithDamping to e.g. 3, 0.3, ...
2. setting initialSpringVelocity to e.g. 5, 0.5, ...
3. there is no difference between setting in on configuration or directly with UIView.animate

Specifications

• Version: 13
• Platform: iOS

[Marcos Griselli]

Hi @haemi, thanks for reporting this. I'll take a look at it in the upcoming days.

[Marcos Griselli]

@haemi, the springs are working as expected.

I'm using these values to create the animation below:

UIView.animate(
    views: self.collectionView!.orderedVisibleCells,
    animations: animations,
    duration: 1.3,
    usingSpringWithDamping: 0.45,
    initialSpringVelocity: 10
)

Perhaps your animation uses the default duration and it's to fast to appreciate the spring?
Also, keep in mind that usingSpringWithDamping goes from 0 to 1.