React-native: ScrollView snapToInterval iOS not working [android integration?]

[julesmoretti]

Description

Explain what you did:
Implemented a column ScrollView (say 400 in height) with smaller height cards inside it (say 100 in height).

Added:

snapToAlignment={'start'}
snapToInterval={100}

what you expected to happen:
I expected the scroll to stop every 100

what actually happens:
but instead kept paging at 400.

Reproduction Steps and Sample Code

    var _scrollView: ScrollView;

    return (
<ScrollView
  pagingEnabled
contentContainerStyle={{height: 400}}
  ref={(scrollView) => { _scrollView = scrollView; }}
  snapToAlignment={'start'}
  snapToInterval={100}
>
{this.state.contentArray.map((text, index) => <Text style={{height: 100} key={index} >{data}</Text>)}
</ScrollView>

Solution

Clearer documentation. And status update with the Android implementation: https://github.com/facebook/react-native/pull/1532

Additional Information

• React Native version: "react-native": "0.40.0",
• Platform: iOS (Android ideally)
• Development Operating System: MacOS
• Dev tools: Xcode and iOS emulator iPhone 6

[uandco]

Yeah I ran into the same issue and had to look at the source code to figure out you have to turn pagingEnabled off when using snapToInterval. The code comment is actually super clear about it but it's not specified in the documentation.

[hramos]

Hi there! This issue is being closed because it has been inactive for a while. Maybe the issue has been fixed in a recent release, or perhaps it is not affecting a lot of people. Either way, we're automatically closing issues after a period of inactivity. Please do not take it personally!

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