我正在尝试延迟一段时间后播放音频。
_onPlayPausePressed = () => {
if (this.sound != null) {
if (this.state.isPlaying) {
this.sound.pauseAsync();
} else {
setTimeout(this.sound.playAsync(), 2000);
}
}
};
然而它返回了错误:t.apply不是一个函数。(在't.apply(void 0,o)'中,'t.apply'未定义) 我尝试过Oleg更新的方法。第一次它起作用了,但之后再运行就不行了。以下是我代码的更多细节:
//import the array with sound details:{id, name desc, sound}
import { soundArray } from "./CreateRecord";
...
export default class CurrentRecord extends React.Component {
constructor(props) {
super(props);
this.currentSound = [];
this.recording = null;
this.sound = null;
this.isSeeking = false;
this.shouldPlayAtEndOfSeek = false;
this.state = {
haveRecordingPermissions: false,
isLoading: false,
isPlaybackAllowed: false,
muted: false,
soundPosition: null,
soundDuration: null,
recordingDuration: null,
shouldPlay: false,
isPlaying: false,
isRecording: false,
fontLoaded: false,
shouldCorrectPitch: true,
volume: 1.0,
rate: 1.0,
isModalVisible: false
};
this.recordingSettings = JSON.parse(
JSON.stringify(Audio.RECORDING_OPTIONS_PRESET_LOW_QUALITY)
);
}
//load the audio when the component mount
componentDidMount() {
this.loadAudio();
(async () => {
await Font.loadAsync({
"cutive-mono-regular": require("../../assets/fonts/CutiveMono-Regular.ttf")
});
this.setState({ fontLoaded: true });
})();
this._askForPermissions();
}
//load the sound
async loadAudio() {
const { navigation } = this.props;
const id = navigation.getParam("id");
this.sound = new Audio.Sound();
for (let i = 0; i < soundArray.length; i++) {
if (soundArray[i].id === id) {
this.currentSound = soundArray[i];
console.log(this.currentSound);
break;
}
}
try {
await this.sound.loadAsync({
uri: this.currentSound.sound /* url for your audio file */
});
await this.sound.setOnPlaybackStatusUpdate(
this._updateScreenForSoundStatus
);
} catch (e) {
console.log("ERROR Loading Audio", e);
}
}
//change screen based on the status
_updateScreenForSoundStatus = status => {
if (status.isLoaded) {
this.setState({
soundDuration: status.durationMillis,
soundPosition: status.positionMillis,
shouldPlay: status.shouldPlay,
isPlaying: status.isPlaying,
rate: status.rate,
muted: status.isMuted,
volume: status.volume,
shouldCorrectPitch: status.shouldCorrectPitch,
isPlaybackAllowed: true
});
} else {
this.setState({
soundDuration: null,
soundPosition: null,
isPlaybackAllowed: false
});
if (status.error) {
console.log(`FATAL PLAYER ERROR: ${status.error}`);
}
}
};
_askForPermissions = async () => {
const response = await Permissions.askAsync(Permissions.AUDIO_RECORDING);
this.setState({
haveRecordingPermissions: response.status === "granted"
});
};
//here's where i want to delay the audio file.
_onPlayPausePressed = () => {
if (this.sound != null) {
if (this.state.isPlaying) {
this.sound.pauseAsync();
} else {
setTimeout(() => this.sound.playAsync(), 2000);
}
}
};
_onStopPressed = () => {
if (this.sound != null) {
this.sound.stopAsync();
}
};
_onMutePressed = () => {
if (this.sound != null) {
this.sound.setIsMutedAsync(!this.state.muted);
}
};
_onVolumeSliderValueChange = value => {
if (this.sound != null) {
this.sound.setVolumeAsync(value);
}
};
_trySetRate = async (rate, shouldCorrectPitch) => {
if (this.sound != null) {
try {
await this.sound.setRateAsync(rate, shouldCorrectPitch);
} catch (error) {
// Rate changing could not be performed, possibly because the client's Android API is too old.
}
}
};
_onRateSliderSlidingComplete = async value => {
this._trySetRate(value * RATE_SCALE, this.state.shouldCorrectPitch);
};
_onPitchCorrectionPressed = async value => {
this._trySetRate(this.state.rate, !this.state.shouldCorrectPitch);
};
_onSeekSliderValueChange = value => {
if (this.sound != null && !this.isSeeking) {
this.isSeeking = true;
this.shouldPlayAtEndOfSeek = this.state.shouldPlay;
this.sound.pauseAsync();
}
};
_onSeekSliderSlidingComplete = async value => {
if (this.sound != null) {
this.isSeeking = false;
const seekPosition = value * this.state.soundDuration;
if (this.shouldPlayAtEndOfSeek) {
this.sound.playFromPositionAsync(seekPosition);
} else {
this.sound.setPositionAsync(seekPosition);
}
}
};
_getSeekSliderPosition() {
if (
this.sound != null &&
this.state.soundPosition != null &&
this.state.soundDuration != null
) {
return this.state.soundPosition / this.state.soundDuration;
}
return 0;
}
_getMMSSFromMillis(millis) {
const totalSeconds = millis / 1000;
const seconds = Math.floor(totalSeconds % 60);
const minutes = Math.floor(totalSeconds / 60);
const padWithZero = number => {
const string = number.toString();
if (number < 10) {
return "0" + string;
}
return string;
};
return padWithZero(minutes) + ":" + padWithZero(seconds);
}
_getPlaybackTimestamp() {
if (
this.sound != null &&
this.state.soundPosition != null &&
this.state.soundDuration != null
) {
return `${this._getMMSSFromMillis(
this.state.soundPosition
)} / ${this._getMMSSFromMillis(this.state.soundDuration)}`;
}
return "";
}
_getRecordingTimestamp() {
if (this.state.recordingDuration != null) {
return `${this._getMMSSFromMillis(this.state.recordingDuration)}`;
}
return `${this._getMMSSFromMillis(0)}`;
}