software-mansion/react-native-svg

iOS: onPress is not working on the SVG Path

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#1,256 opened on Jan 20, 2020

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Description

Bug

I've created the following sample.

arc-bug

This is an arc which is rendered as per my expectations. When I press anywhere on the arc, on Android, onPress is always called properly but on iOS, sometimes onPress is called but sometimes it doesn't. Some part of the arc is not clickable on iOS.

Also, there isn't any positioning element(absolute/relative positioned) overlapping the arc.

Environment info

react-native: 0.61.5 react-native-svg: 9.13.3

Reproducible sample code

I'm using Path to show an elliptical arc as follows.

<Svg
   height={deviceHeight - 200}
   width={deviceWidth}
>
    <Path
       ref={ref => this.pathRef = ref}
       fill="none"
       stroke='rgba(214,51,51,.2)'
       strokeWidth={35}
       onPress={() => console.log('path on pressed called!')}
       d="M 392.72727272727275 124.90909090909088 A 360 450 0 0 0 42.72727272727275 574.9090909090909"
    />
</Svg>

Contributor guide

Research direction
Examine the iOS SVG hit detection implementation in react native svg, particularly for Path elements with elliptical arc commands. Trace the event handling code to find where touch points are mapped to path boundaries.
Tech stack
react nativeios
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.
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.
Clear
Prerequisites
GitReact Native
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75