关于vue.js:uniappvue基于InnerAudioContext封装一个基本的音频组件

原由

同样的是因为小程序官网不保护 audio 组件了

音频组件的要求与限度

1. 点击播放或者暂停
2. 显示播放进度及总时长
3. 通过图标变动显示以后音频所处状态（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. 来到页面之后要主动进行播放并销毁音频实例

资料 / 属性 / 办法

让咱们开始吧????

uni-app Vue

• 同样的先结构 DOM 构造

<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>

• 定义承受的组件

props: {
  audioSrc: {
    type: String,
    default: ''
  },
},

• 定义 CustomAudio 组件的初始化相干的操作，并给 innerAudioContext 的回调增加一些行为（之前 Taro 那篇咱们踩过的坑这里就间接上代码了）

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, // 音频以后播放的时长
    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: '有效音源, 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}`
  }
},

同样的 scss 文件

<style lang="scss" scoped>
.custom-audio {
  border-radius: 8vw;
  border: #CCC 1px solid;
  background: #F3F6FC;
  color: #333;
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
  padding: 2vw;
  font-size: 14px;
  .audio-btn {
    width: 10vw;
    height: 10vw;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}
</style>

最初

各位有遇到什么问题或有什么倡议的能够跟我探讨哟~