CollectionView scrolling behaviour

[alextudge]

Check these before submitting:

• [/] The issue doesn't involve an Unsupported Feature
• [/] This issue isn't related to another open issue

This issue is a:

• [] Non-Crashing Bug (Visual or otherwise)
• [] Crashing Bug
• [] Feature Request
• [/] Regression (Something that once worked, but doesn't work anymore)

Which Version of Lottie are you using?

Lottie 3.0

What Platform are you on?

• [] MacOS
• [/] iOS

What Language are you in?

• [/] Swift
• [] Objective-C

Expected Behavior

When adding lottie into a collectionView (one lottie per full screen cell) the horizontal transition should remain smooth.

Actual Behavior

When scrolling through a collection view (one lottie per full screen cell) the horizontal transition is jumpy and generates the following console output:
2019-04-08 11:15:45.705072+0100 MoneyBox[6939:161528] [UIWorkIntervalTiming] workIntervalStart: startTimestamp > targetTimestamp; rolling forward by 0.483333

Converting the lottie view to UIView's confirms that normal behaviour and no console output is generated when lottie isn't present

Code Example

Each cell's lottie is played on cell appearance, and has its currentProgress set to 0 as the cell disappears. It is set to playOnce.

Animation JSON

[lucasmpaim]

+1 Same problem with UITableView, when play an animation the scroll not remain smooth

[tundsD53]

I've downgraded to version 2.5.3 in Obj-C and the scrolling seems to be smoother, so this is definitely related to Swift and the issue tagged above.

[calda]

Closing since this seems like a question and not a bug report. Feel free to start a discussion if you'd still like support.