Expo av 仅从耳机而不是扬声器播放音频

Question

当我运行

npx expo start

并在我的 IOS 设备上运行应用程序时，仅从耳机而不是扬声器播放音频，知道为什么会发生这种情况吗？

这是我的代码：

import { View, StyleSheet,Button } from 'react-native';
import React, { useState, useEffect } from 'react';
import { Audio } from 'expo-av';

export default function App() {

  const [audioPermission, setAudioPermission] = useState(null);

  useEffect(() => {
    // Simply get recording permission upon first render
    async function getPermission() {
      await Audio.requestPermissionsAsync().then((permission) => {
        console.log('Permission Granted: ' + permission.granted);
        setAudioPermission(permission.granted)
      }).catch(error => {
        console.log(error);
      });
    }

    // Call function to get permission
    getPermission()
  }, []);

  async function playSound() {
    try {
      await Audio.setAudioModeAsync({
        allowsRecordingIOS: true,
        playsInSilentModeIOS: true
      })
        const {sound} = await Audio.Sound.createAsync(require('./assets/beep.mp3'));
        await sound.playAsync();
    } catch (error) {
      console.error('Failed to play sound', error);
    }
  }

  return (
    <View style={styles.container}>
      <Button
        title="play sound"
        onPress={playSound}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
  button: {
    alignItems: 'center',
    justifyContent: 'center',
    width: 128,
    height: 128,
    borderRadius: 64,
    backgroundColor: 'red',
  },
});

我还尝试将 Audio.setAudioModeAsync 内的属性（如 allowedRecordingIOS 和playsInSilentModeIOS）替换为 false，但这不起作用。

Answer 1

您必须将 allowedRecordingIOS 设置为 false。