Heim >Web-Frontend >uni-app >Detaillierte Erläuterung der Uni-App (vue), die eine grundlegende Audiokomponente basierend auf InnerAudioContext kapselt
Verwandte Lernempfehlungen: Entwicklung des WeChat-Miniprogramms
Derselbe liegt darin, dass der Beamte des Miniprogramms die audio
-Komponente nicht verwaltetaudio
组件了
1、点击播放或者暂停
2、显示播放进度及总时长
3、通过图标变化显示当前音频所处状态(暂停/播放/加载中)
4、页面音频更新时刷新组件状态
5、全局有且只有一个音频处于播放状态
6、离开页面之后要自动停止播放并销毁音频实例
让我们开始吧
DOM
结构<view class="custom-audio"> <image v-if="audioSrc !== undefined && audioSrc !== null && audioSrc !== ''" @click="playOrStopAudio" :src="audioImg" class="audio-btn" /> <text v-else @click="tips" class="audio-btn">无音源</text> <text>{{ fmtSecond(currentTime) }}/{{ fmtSecond(duration) }}</text></view>复制代码
props: { audioSrc: { type: String, default: '' }, },复制代码
CustomAudio
组件的初始化相关的操作,并给innerAudioContext
的回调添加一些行为(之前Taro那篇我们踩过的坑这里就直接上代码了)import { formatSecondToHHmmss, afterAudioPlay, beforeAudioRecordOrPlay } from '../../lib/Utils'const iconPaused = '../../static/images/icon_paused.png'const iconPlaying = '../../static/images/icon_playing.png'const iconStop = '../../static/images/icon_stop.png'const iconLoading = '../../static/images/icon_loading.gif'// ...data() { return { audioCtx: null, // 音频上下文 duration: 0, // 音频总时长 currentTime: 0, // 音频当前播放的时长 audioImg: iconLoading, // 默认状态为加载中 } },watch: { audioSrc: { handler(newSrc, oldSrc) { console.log('watch', newSrc, oldSrc) this.audioImg = iconLoading this.currentTime = 0 this.duration = 0 if (this.audioCtx === undefined) { this.audioCtx = uni.createInnerAudioContext() this.onTimeUpdate = this.audioCtx.onTimeUpdate this.bindAuidoCallback(this.audioCtx) } else { this.audioCtx.src = newSrc } if (this.audioCtx.play) { this.audioCtx.stop() getApp().globalData.audioPlaying = false } } } }, mounted() { this.audioCtx = uni.createInnerAudioContext() this.audioCtx.src = this.audioSrc this.audioCtx.startTime = 0 this.bindAuidoCallback(this.audioCtx) },methods: { bindAuidoCallback(ctx) { ctx.onTimeUpdate((e) => { this.onTimeUpdate(e) }) ctx.onCanplay((e) => { this.onCanplay(e) }) ctx.onWaiting((e) => { this.onWaiting(e) }) ctx.onPlay((e) => { this.onPlay(e) }) ctx.onPause((e) => { this.onPause(e) }) ctx.onEnded((e) => { this.onEnded(e) }) ctx.onError((e) => { this.onError(e) }) }, tips(){ uni.showToast({ title: '无效音源,请先录音', icon: 'none' }) }, playOrStopAudio() { if (this.audioCtx === null) { this.audioCtx = uni.createInnerAudioContext() this.audioCtx.src = this.audioSrc this.bindAuidoCallback(this.audioCtx) } if (this.audioCtx.paused) { if (beforeAudioRecordOrPlay('play')) { this.audioCtx.play() this.audioImg = iconPlaying } } else { this.audioCtx.pause() afterAudioPlay() this.audioImg = iconPaused } }, onTimeUpdate(e) { console.log('onTimeUpdate', this.audioCtx.duration, this.audioCtx.currentTime) if (this.audioCtx.currentTime > 0 && this.audioCtx.currentTime <= 1) { this.currentTime = 1 } else if (this.currentTime !== Math.floor(this.audioCtx.currentTime)) { this.currentTime = Math.floor(this.audioCtx.currentTime) } const duration = Math.floor(this.audioCtx.duration) if (this.duration !== duration) { this.duration = duration } }, onCanplay(e) { if (this.audioImg === iconLoading) { this.audioImg = iconPaused } console.log('onCanplay', e) }, onWaiting(e) { if (this.audioImg !== iconLoading) { this.audioImg = iconLoading } }, onPlay(e) { console.log('onPlay', e, this.audioCtx.duration) this.audioImg = iconPlaying if (this.audioCtx.duration > 0 && this.audioCtx.duration <= 1) { this.duration = 1 } else { this.duration = Math.floor(this.audioCtx.duration) } }, onPause(e) { console.log('onPause', e) this.audioImg = iconPaused }, onEnded(e) { console.log('onEnded', e) if (this.audioImg !== iconPaused) { this.audioImg = iconPaused } afterAudioPlay() }, onError(e) { uni.showToast({ title: '音频加载失败', icon: 'none' }) throw new Error(e.errMsg, e.errCode) }, fmtSecond(sec) { const { min, second } = formatSecondToHHmmss(sec) return `${min}:${second}` } },复制代码
scss
Endlich
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