xamarin/Xamarin.Forms

Label LineHeight does not render the same on iOS and Android

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#6,046 opened on Apr 29, 2019

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e/6 :clock6:help wantedinactivep/iOS 🍎t/bug :bug:up-for-grabs

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Description

Description

If you change the default LineHeight on a Label, when text is wrapped, Android seems to be applying spacing between lines. On the other hand, iOS changes the height of each line, which creates unnecessary padding above the first line.

Steps to Reproduce

Run the attached repro on both platforms and notice that iOS line spacing is off. I'm not sure if this is the default behavior on iOS, but it'd be great to have consistency on both platforms.

Reproduction Link

App18776.zip

Contributor guide

Research direction
Investigate the platform specific implementations of Label LineHeight in Xamarin.Forms for iOS and Android to understand why line spacing differs. Look at the CoreGraphics (iOS) and Android.Text (Android) rendering code.
Tech stack
csharp
Domain
frontend
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
C#Xamarin.Forms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60