airbnb/lottie-ios

The Main Thread rendering engine doesn't currently support repeaters. To play an animation with repeaters, you can use the Core Animation rendering engine instead

Open

#1,739 opened on Sep 5, 2022

View on GitHub
 (20 comments) (2 reactions) (0 assignees)Swift (3,831 forks)batch import
enhancementhelp wanted

Repository metrics

Stars
 (26,751 stars)
PR merge metrics
 (Avg merge 2d 16h) (5 merged PRs in 30d)

Description

Hi, I am getting this error.

Lottie/ItemsExtension.swift:83: Fatal error: The Main Thread rendering engine doesn't currently support repeaters. To play an animation with repeaters, you can use the Core Animation rendering engine instead. 2022-09-05 21:45:24.501920+0400 Demo[46949:6094753] Lottie/ItemsExtension.swift:83: Fatal error: The Main Thread rendering engine doesn't currently support repeaters. To play an animation with repeaters, you can use the Core Animation rendering engine instead.

Which Version of Lottie are you using?

Lottie 3.4.3

Animation JSON

https://lottiefiles.com/59461-heart-beat-pop-up

Contributor guide

Research direction
Identify where the rendering engine is chosen in the Lottie iOS codebase. Look for the code that triggers the fatal error in ItemsExtension.swift line 83. Understand how repeaters are supported in Core Animation engine but not Main Thread engine. Implement support for repeaters in the Main Thread rendering engine, or add an automatic fallback to the Core Animation engine when repeaters are detected.
Tech stack
swift
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
SwiftXcode
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70