lexrus/LTMorphingLabel

Morphing animation messes up San Francisco Display font

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#61 创建于 2016年7月25日

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 (2 评论) (0 反应) (0 负责人)Swift (8,150 star) (780 fork)batch import
enhancementhelp wanted

描述

I really like how the colon character (:) is a little bit raised up and not touching the baseline in the San Francisco Display font introduced in WWDC 2015. Here is how it is supposed to look like:

However, once I changed the text of the label to something else with the .Fall animation, the colon dropped onto the baseline:

I believe that this is caused by the way you draw the text using Core Text. Can you fix it?

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。
1-3 hours
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。
clear
前置要求
SwiftCore TextiOS development
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。
35
研究方向
Investigate the Core Text drawing code in LTMorphingLabel, specifically the method that renders text. The issue is that the colon character drops to the baseline during morphing animation. Examine how font attributes like baseline offset are handled. Since the issue is old, verify it still occurs with current iOS versions and the latest library code. Check comments for any previous attempts or maintainer input.