react / react/react-native

`View` inside `ScrollView` makes scroll-to-top when multiline input grows

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Component: ScrollView Issue: Author Provided Repro Needs: Attention Newer Patch Available
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Description

Description

I use this component:

import React, { forwardRef } from "react";

import {
  ScrollView,
  ScrollViewProps,
  View,  
} from "react-native";

export type KeyboardAwareScrollViewProps = {
  /** The distance between keyboard and focused `TextInput` when keyboard is shown. Default is `0`. */
  bottomOffset?: number;
  /** Prevents automatic scrolling of the `ScrollView` when the keyboard gets hidden, maintaining the current screen position. Default is `false`. */
  disableScrollOnKeyboardHide?: boolean;
  /** Controls whether this `KeyboardAwareScrollView` instance should take effect. Default is `true` */
  enabled?: boolean;
  /** Adjusting the bottom spacing of KeyboardAwareScrollView. Default is `0` */
  extraKeyboardSpace?: number;
  /** Custom component for `ScrollView`. Default is `ScrollView` */
  ScrollViewComponent?: React.ComponentType<ScrollViewProps>;
} & ScrollViewProps;

const KeyboardAwareScrollView = forwardRef<
  ScrollView,
  React.PropsWithChildren<KeyboardAwareScrollViewProps>
>(
  (
    {
      children,
      ...rest
    },
    ref,
  ) => {

    return (
      <>
      <ScrollView {...rest} scrollEventThrottle={16}>
        {children}
        <View style={{height: 336, backgroundColor: 'red'}} />
      </ScrollView>
      
      </>
    );
  },
);

export default KeyboardAwareScrollView;

And I use it the code:

import React, { useCallback, useEffect, useRef, useState } from "react";
import { Button, Platform, Switch, Text, View, TextInput, StyleSheet } from "react-native";

export default function AwareScrollView() {
  const [_, setText] = useState("");

  return (
    <View style={styles.main}>
        <KeyboardAwareScrollView>
          <View style={styles.contentContainer}>
            <TextInput
              style={styles.contentText}
              multiline
              value={_}
              onChangeText={(value) => setText(value)}
              scrollEnabled={false}
            />
          </View>
        </KeyboardAwareScrollView>
      </View>
  );
}

export const styles = StyleSheet.create({
  safeAreaView: {
    flex: 1,
  },

  main: {
    flex: 1,
    marginBottom: 0,
  },

  contentContainer: {
    padding: 15,
    flexGrow: 1,
  },

  contentText: {
    width: "100%",
    backgroundColor: "#bcbcbc",
    flex: 1,
    fontSize: 16,
    minHeight: 60,
    textAlignVertical: "top",
  },
});
Steps to reproduce
  1. Type a long message in multiline input (you can simply press Enter/move to the next line to speed up the process)
  2. When TextInput gets obscured by keyboard scroll till the bottom to make sure the bottom of TextInput is visible
  3. Start to type a long message (you can use predictive text to speed up the process)
  4. When text goes to a new line ScrollView suddenly scrolls to top

Expected result is that ScrollView should remain its position.

React Native Version

0.76.2

Affected Platforms

Runtime - iOS

Output of npx react-native info
System:
  OS: macOS 15.1
  CPU: (10) arm64 Apple M1 Pro
  Memory: 118.81 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 20.18.0
    path: ~/.nvm/versions/node/v20.18.0/bin/node
  Yarn:
    version: 1.22.22
    path: ~/.nvm/versions/node/v20.18.0/bin/yarn
  npm:
    version: 10.8.2
    path: ~/.nvm/versions/node/v20.18.0/bin/npm
  Watchman:
    version: 2024.10.21.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.14.3
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.1
      - iOS 18.1
      - macOS 15.1
      - tvOS 18.1
      - visionOS 2.1
      - watchOS 11.1
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.2 AI-242.23339.11.2421.12483815
  Xcode:
    version: 16.1/16B40
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.9
    path: /usr/bin/javac
  Ruby:
    version: 2.7.6
    path: /Users/kirylziusko/.rbenv/shims/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.0.1
    wanted: 15.0.1
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.76.2
    wanted: 0.76.2
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false
Stacktrace or Logs
I don't have any logs, bug from what I debugged in XCode methods like `scrollToOffset`/`scrollToEnd`/`scrollViewShouldScrollToTop` are not getting called.
Reproducer

https://github.com/kirillzyusko/react-native-keyboard-controller/blob/main/example/src/screens/Examples/AwareScrollView/index.tsx

Screenshots and Videos

https://github.com/user-attachments/assets/48078f8b-a1cc-42c2-8637-deeaa5a28346

Guide de contribution

Ouvrir le guide de contribution

Par où commencer

  1. Lisez l'issue en entier, puis le guide de contribution du projet.
  2. Signalez en commentaire que vous la prenez — cela évite que deux personnes fassent le même travail.
  3. Forkez le dépôt et travaillez sur une branche.
  4. Ouvrez une pull request qui référence le numéro de l'issue.

Piste de recherche

Commencez par exécuter le reproducteur lié dans example/src/screens/Examples/AwareScrollView/index.tsx sur iOS avec React Native 0.76.2, en utilisant le TextInput multiligne dans ScrollView décrit dans l’issue. Examinez le comportement de ScrollView et de TextInput lorsque le champ de saisie s’agrandit alors que le défilement se trouve près du bas. C’est terminé lorsque ScrollView reste à sa position actuelle lorsque TextInput atteint une nouvelle ligne.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Évaluation

Stack technique
ios, react-native, typescript
Domaine
mobile
Type d'issue
Bug
Difficulté
4/5
Temps estimé
3-5 jours
Activité
À l'abandon
Clarté
Plutôt claire
Accessibilité débutants
45/100

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