xamarin/Xamarin.Forms

[Bug] iOS Button with FontIconSource: Icon jumps around when changing text

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#9,021 opened on Dec 26, 2019

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a/fonticone/4 :clock4:help wantedinactivep/iOS 🍎t/bug :bug:up-for-grabs

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Description

Description

When changing the text on a button with a FontImageSource, the icon jumps around. In my project the text is set via DataTriggers.

Steps to Reproduce

  1. Add a button with data triggers to a page, where the data triggers are bound to a viewmodel and change the text according to the bound value
  2. Add an icon to the button via FontImageSource
  3. change the bound value and observe the icon jumping

Expected Behavior

Only the buttons text changes

Actual Behavior

The buttons text changes as expected but the icon "jumps around"

Basic Information

  • Version with issue: 4.4
  • iOS Only

Screenshots

Jumping Glyph

Contributor guide

Research direction
Investigate the iOS button renderer's layout handling when both text and icon (FontIconSource) are updated. Focus on how the icon's frame is set relative to the text.
Tech stack
csharp
Domain
mobile
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
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
C#Xamarin.Forms
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60