badoo/Chatto

Visual bugs when changing many item's heights

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#614 创建于 2019年10月2日

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 (0 评论) (0 反应) (0 负责人)Swift (4,166 star) (561 fork)batch import
bughelp wanted

描述

When updating heights of multiple items (18 items in my example), I've got a visual bug - flickering effect with new (updated) items are flowing up from the bottom of collection and moving to some top position beyond the screen. I attached video when you can see it if you will look frame-by-frame. I also attached a screenshot of the middle state of this animation.

Video: Screen Recording 2019-10-02 at 18.08.22.mov.zip

贡献者指南

技术栈
swift
领域
mobile
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
half day
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
SwiftiOS developmentChatto frameworkUICollectionView
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
The issue describes a flickering effect when updating heights of multiple items in a chat collection. Investigate the layout and animation code in Chatto, particularly around height changes and the collection view's batch updates. Look at the Chatto framework's collection view layout implementation to identify potential causes of the flickering. Since the issue is from 2019 and unaddressed, consider updating dependencies or testing with newer iOS versions.