SWReveal - CoreAnimation warnings: stiffness/damping must be greater than 0

Question

I have integrated SWReveal into my app after running tests in a seperate project.

I downloaded SWReveal (latest = v2.4) from here and followed tutorial on AppCoda.

In the stand alone project I had no issues. However inside my app (still running as a set of standalone view controllers/table, I am getting these two warnings:

CoreAnimation: stiffness must be greater than 0.
CoreAnimation: damping must be greater than or equal to 0.

Warnings go away if I either disable all aspects of scrolling or enable all of them. This is not the same as the sample project I got from AppCoda (where I get no warnings output to the console).

Although it is not an issue, I would like to try and understand the cause of this error.

Thanks!

Nope. Wrote my own side menu in swift and integrated that into my app. — zevij, Nov 04 '15 at 10:01

score 4 · Answer 1 · edited Mar 10 '17 at 11:00

I'm not 100% sure, I can't explain why and I'm not sure if this is of any help, but changing lines:

if (abs(nowPoint.x - _beginPoint.x) > kDirectionPanThreshold)
    _dragging = YES;
else if (abs(nowPoint.y - _beginPoint.y) > kDirectionPanThreshold)
    self.state = UIGestureRecognizerStateFailed;

in SWRevealViewController.m -> - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

to:

if (fabs(nowPoint.x - _beginPoint.x) > kDirectionPanThreshold)
    _dragging = YES;
else if (fabs(nowPoint.y - _beginPoint.y) > kDirectionPanThreshold)
    self.state = UIGestureRecognizerStateFailed;

seem to have made the warnings disappear for me.

SWReveal - CoreAnimation warnings: stiffness/damping must be greater than 0

1 Answers1