residual oscillation

[allen8300]

Hi, man, thanks so much for your hard work.
But in the native Messages app, there is no oscillation, everything is smooth.
In the demo app, there is a residual oscillation.
Can you please solve it? So that it works more smoothly?

[iTofu]

Make sure item.center is returning X and Y values that are floats with NO DECIMALS.
https://stackoverflow.com/a/24564539/6137672

In that case:

// Line 87:
UIAttachmentBehavior *springBehaviour = [[UIAttachmentBehavior alloc] initWithItem:item attachedToAnchor:center];
// ->
center.x = (int)center.x;
center.y = (int)center.y;
UIAttachmentBehavior *springBehaviour = [[UIAttachmentBehavior alloc] initWithItem:item attachedToAnchor:center];

// Line 205:
UIAttachmentBehavior *springBehaviour = [[UIAttachmentBehavior alloc] initWithItem:attributes attachedToAnchor:attributes.center];
// ->
CGPoint center = attributes.center;
center.x = (int)center.x;
center.y = (int)center.y;
UIAttachmentBehavior *springBehaviour = [[UIAttachmentBehavior alloc] initWithItem:attributes attachedToAnchor:center];