问题描述
onPlaybackStatusUpdate 应在每 100 毫秒后返回输出,但仅在播放或停止时返回。我的代码中是否缺少某些内容。 (我是 Expo 和 Expo AV 的新手)。 请参阅下面用于加载和播放音频文件的代码
if(!sound._loaded)
await sound.loadAsync(
require('./assets/Audio.mp3'),initialStatus,);
sound.setStatusAsync({progressUpdateIntervalMillis: 200});
sound.setonPlaybackStatusUpdate(onPlaybackStatusUpdate);
await sound.playAsync();
console.log(sound);
}
const initialStatus = (status) => {
console.log("initialStatus");
console.log(status);
}
let onPlaybackStatusUpdate = async (playbackStatus) => {
//if(!isNaN(playbackStatus.durationMillis))
//setTotalLength(playbackStatus.durationMillis/1000);
//setCurrentPos(playbackStatus.positionMillis.toString().split(".")[0]/1000);
//setIsPlaying(playbackStatus.isPlaying);
console.log("onPlaybackStatusUpdate");
console.log(playbackStatus);
}
解决方法
对于声音实例,创建一个 ref
变量并使用它来触发暂停/播放以及加载。
像这样,
const sound = React.useRef(new Audio.Sound());
用于加载音频,
const result = await sound.current.loadAsync(require('./test.mp3'),{},true);
if (result.isLoaded === false) {
console.log('Error in Loading Audio');
} else {
// Audio is loaded do whatever needed
}
暂停
const result = await sound.current.getStatusAsync();
if (result.isLoaded) {
if (result.isPlaying === true) {
// sound.current.pauseAsync();
// Pause Here
}
}
为了玩耍,
const result = await sound.current.getStatusAsync();
if (result.isLoaded) {
if (result.isPlaying === false) {
// sound.current.playAsync();
// play Here
}
}