react / react/react-native

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

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#48,412 7 comentarios 5 reacciones 0 asignados Ver en GitHub

Nadie ha tomado este issue todavía.

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

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

Guía de contribución

Abrir la guía de contribución

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

Línea de trabajo

Empieza ejecutando el reproductor vinculado en example/src/screens/Examples/AwareScrollView/index.tsx en iOS con React Native 0.76.2, usando el TextInput multilínea dentro de ScrollView descrito en el issue. Inspecciona el comportamiento de ScrollView y TextInput cuando el input crece mientras se ha desplazado cerca de la parte inferior. La tarea está terminada cuando ScrollView permanece en su posición actual al alcanzar TextInput una nueva línea.

Escrito por el modelo de indexación a partir del texto del issue.

Evaluación

Stack tecnológico
ios, react-native, typescript
Área
mobile
Tipo de issue
Error
Dificultad
4/5
Tiempo estimado
3-5 días
Estado de actividad
Estancado
Claridad
Bastante claro
Aptitud para principiantes
45/100

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