Slow down UISnapBehavior

Question

I am using a UISnapBehavior but it is snapping too quickly for my liking. Is there a way to slow it down? Or in other words: is there a way to adjust the elasticity of the object with the point where it should snap to?

score 15 · Accepted Answer · edited Aug 14 '14 at 16:35

15

I was able to solve this by attaching the view to a UIDynamicItemBehavior as well and setting the resistance property.

UIDynamicItemBehavior *dynamicItemBehavior = [[UIDynamicItemBehavior alloc] initWithItems:@[ view ]];
dynamicItemBehavior.resistance = 100;
[animator addBehavior:dynamicItemBehavior];

edited Aug 14 '14 at 16:35

Kyle Clegg

38,547
26
130
141

answered Oct 18 '13 at 05:31

drewag

93,393
28
139
128

Can you post a code snippet for this? I'm doing the same thing but not seeing an affect on speed of snap... – Alfie Hanssen Jan 14 '14 at 21:09
Ah! Nevermind, I was using values between 0 and 1, values over 1 do the trick – Alfie Hanssen Jan 14 '14 at 21:10
ya @AlfieHanssen, I'm using values of 50 and 100 right now in my app – drewag Jan 15 '14 at 00:26
This makes sense but for some reason it didn't work for me. – matt Aug 27 '22 at 02:24

score 3 · Answer 2 · answered Oct 18 '13 at 01:58

3

Try setting the behaviour's damping property to a number > 1.0. The header says damping should remain in [0.0, 1.0] however values larger than 1.0 seem to work fine.

answered Oct 18 '13 at 01:58

Rhythmic Fistman

34,352
5
87
159

This may be the best way if you only want to affect the snap behavior without affecting other physics of the item being snapped. For example, if you have a velocity on the item and set the resistance high, velocity too will have less of an effect. However, sadly, when setting damping, things get screwy/wonky with the snapbehavior and I wonder if it's a bug. – Arjun Mehta Mar 05 '14 at 01:55
Thanks, snapping with damping 10 looks nice for me – Andriy Zymenko May 31 '16 at 07:57

Slow down UISnapBehavior

2 Answers2