/**
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* @fileoverview audio 组件
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*/
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const context = require('./context')
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Component({
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data: {
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time: '00:00'
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},
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properties: {
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name: String, // 音乐名
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author: String, // 作者
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poster: String, // 海报图片地址
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autoplay: Boolean, // 是否自动播放
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controls: Boolean, // 是否显示控件
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loop: Boolean, // 是否循环播放
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src: { // 源地址
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type: String,
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observer (src) {
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this.setSrc(src)
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}
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}
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},
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created () {
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// 创建内部 context
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this._ctx = wx.createInnerAudioContext()
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this._ctx.onError(err => {
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this.setData({
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error: true
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})
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this.triggerEvent('error', err)
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})
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this._ctx.onTimeUpdate(() => {
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const time = this._ctx.currentTime
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const min = parseInt(time / 60)
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const sec = Math.ceil(time % 60)
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const data = {}
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data.time = (min > 9 ? min : '0' + min) + ':' + (sec > 9 ? sec : '0' + sec)
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// 不在拖动状态下需要更新进度条
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if (!this.lastTime) {
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data.value = time / this._ctx.duration * 100
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}
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this.setData(data)
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})
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this._ctx.onEnded(() => {
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if (!this.properties.loop) {
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this.setData({
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playing: false
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})
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}
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})
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// #ifndef ALIPAY
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},
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attached () {
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context.set(this.id, this)
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// #endif
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// #ifdef MP-ALIPAY
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context.set(this.properties.id, this)
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this.setSrc(this.properties.src)
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// #endif
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},
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// #ifdef MP-ALIPAY
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didUpdate (e) {
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if (e.src !== this.properties.src) {
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this.setSrc(this.properties.src)
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}
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},
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// #endif
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detached () {
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this._ctx.destroy()
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// #ifndef MP-ALIPAY
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context.remove(this.id)
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// #endif
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// #ifdef MP_ALIPAY
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context.remove(this.properties.id)
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// #endif
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},
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// #ifndef ALIPAY | TOUTIAO
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pageLifetimes: {
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show () {
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// 播放被后台打断时，页面显示后自动继续播放
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if (this.data.playing && this._ctx.paused) {
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this._ctx.play()
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}
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}
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},
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// #endif
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methods: {
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/**
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* @description 设置源
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* @param {string} src 源地址
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*/
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setSrc (src) {
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this._ctx.autoplay = this.properties.autoplay
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this._ctx.loop = this.properties.loop
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this._ctx.src = src
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if (this.properties.autoplay && !this.data.playing) {
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this.setData({
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playing: true
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})
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}
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},
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/**
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* @description 播放音乐
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*/
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play () {
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this._ctx.play()
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this.setData({
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playing: true
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})
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this.triggerEvent('play'
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// #ifdef MP-ALIPAY
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, {
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target: {
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id: this.props.id
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}
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}
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// #endif
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)
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},
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/**
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* @description 暂停音乐
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*/
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pause () {
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this._ctx.pause()
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this.setData({
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playing: false
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})
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this.triggerEvent('pause')
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},
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/**
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* @description 设置播放速率
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* @param {Number} rate 播放速率
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*/
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playbackRate (rate) {
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this._ctx.playbackRate = rate
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},
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/**
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* @description 停止音乐
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*/
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stop () {
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this._ctx.stop()
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this.setData({
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playing: false,
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time: '00:00'
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})
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this.triggerEvent('stop')
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},
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/**
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* @description 控制进度
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* @param {number} sec 秒数
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*/
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seek (sec) {
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this._ctx.seek(sec)
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},
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/**
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* @description 移动进度条
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* @param {event} e
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* @private
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*/
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_seeking (e) {
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// 避免过于频繁 setData
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if (e.timeStamp - this.lastTime < 200) return
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const time = Math.round(e.detail.value / 100 * this._ctx.duration)
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const min = parseInt(time / 60)
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const sec = time % 60
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this.setData({
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time: (min > 9 ? min : '0' + min) + ':' + (sec > 9 ? sec : '0' + sec)
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})
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this.lastTime = e.timeStamp
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},
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/**
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* @description 进度条移动完毕
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* @param {event} e
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* @private
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*/
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_seeked (e) {
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this._ctx.seek(e.detail.value / 100 * this._ctx.duration)
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this.lastTime = undefined
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}
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}
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})
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