How do I slow down an animation with Facebook Pop?

Question

I'm animating a view on the X-axis using Facebook Pop's spring animation. It works fine, except I can't seem to change the speed. It seems that the velocity property is the only way to do this from what I've read, but no values I set for it seem to have any effect. Am I doing something wrong, or is this a bug?

    POPSpringAnimation *anim = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPositionX];
    anim.velocity = @(100.);
    anim.springBounciness = 15;
    anim.toValue = @(self.scrollView.frame.size.width/2);
    anim.beginTime = .05 * i + CACurrentMediaTime();
    [thisView.layer pop_addAnimation:anim forKey:@"myKey"];

score 12 · Accepted Answer · answered Aug 30 '14 at 07:25

12

try to experiment with those properties (of POPSpringAnimation class):

CGFloat dynamicsFriction
CGFloat dynamicsMass
CGFloat dynamicsTension

answered Aug 30 '14 at 07:25

Mateusz

1,222
11
22

4

This should be marked as solved. Those are exactly the properties you need for this. – artjulian Oct 16 '14 at 01:16

score 1 · Answer 2 · answered Jul 29 '15 at 04:54

1

The POPSpringAnimation springSpeed property is probably what you want. It's easier than having to mess with the 3 other lower level properties (as mentioned by Mateusz). It defaults to 12.

answered Jul 29 '15 at 04:54

patr1ck

964
7
13

How do I slow down an animation with Facebook Pop?

2 Answers2