Solution to the problem that the audio component of WeChat applet cannot be played on iOS

<!-- It is a voice call, there is a call record, and the call description does not contain 'missed' -->
<view class="reference"
    wx:if="{{itemList.activity_type === 'phone' && itemList.activity_reference_id && tool.indexOf(itemList.comment,'missed') === -1 }}">
    <!-- Voice playback-->
    <van-button class="ref-btn" wx:if="{{audioResourceMaps[itemList.activity_reference_id] === undefined}}"
      loading="{{itemList.activity_reference_id === currentGettingReferenceId}}" icon="play" type="info" plain
      data-reference-id="{{itemList.activity_reference_id}}" bindtap="getReference">
    </van-button>
    <view wx:else class="audio-box">
        <!-- Voice playback pause -->   
      <van-button class="ref-btn" wx:if="{{audioResourceMaps[itemList.activity_reference_id]}}"
      data-reference-id="{{itemList.activity_reference_id}}"
        icon="pause" type="info" plain bindtap="pauseAudio"/>
        <!-- Click No Call Recording--> 
      <span wx:else class="no-audio-text">No call recording found</span>
    </view>
</view>

.reference {
  margin-top: 20rpx;
  height: 100%;
  padding: 5rpx;
  box-sizing: border-box;
}

.ref-btn {
  width: 80rpx;
  height: 80rpx;
  display: flex;
}

.ref-btn button {
  width: 80rpx;
  height: 80rpx;
  border-radius: 50%;
}

/**
   * Initial data of the component */
  data: {
    currentGettingReferenceId: null, //The audio id currently being played
    audioResourceMaps: {}, //list of clicked audios isPause:false, //pause or not},
/**
   * Component life cycle */
  lifetimes:
    attached: function () {
      // Because it is a subcomponent, you need to get the instance here this.audioContext = wx.createInnerAudioContext();
    },
    detached: function () {
      // Stop playing this.stopAudio()
      // Executed when the component instance is removed from the page node tree},
  },
  methods: { 
    // Get the recording getReference(e) {
      let id = e.target.dataset.referenceId
      if(id != this.data.currentGettingReferenceId){
        this.stopAudio()
      }
      this.setData({
        currentGettingReferenceId:id
      })
      // Click the interface to obtain the recording URL. The interface request is written according to its own encapsulation WXAPI.getResourceUrl(
        `/conversation/conversationsession/${id}/`, {
          data_type: 'all',
        }).then(({resource_url}) => {
          console.log('audio address ====',resource_url,)
        let url = resource_url && resource_url.indexOf('https://') > -1? encodeURI(resource_url) : null
        this.data.audioResourceMaps[id] = url;
        if(resource_url) this.playAudio(id,url)
        this.setData({
          audioResourceMaps: this.data.audioResourceMaps
        })
        console.log('Played list =====',this.data.audioResourceMaps)
      }).catch(function (e) {
        console.log(e)
      })
    },
    // Pause pauseAudio(){
      this.setData({
        isPause: !this.data.isPause
      })
      let id = this.data.currentGettingReferenceId
      console.log(id,'play paused id')
      const innerAudioContext = this.audioContext
      if(this.data.isPause){
        innerAudioContext.pause()
        console.log('pause playback')
      }else{
        innerAudioContext.play()
        console.log('Continue playing')
      }
    },
    // Stop playing stopAudio(){
      const innerAudioContext = this.audioContext
      innerAudioContext.stop()
      let obj = this.data.audioResourceMaps
      for(let item in obj){
        delete obj[item]
      }
      // To stop playing, clear the audio address corresponding to the playlist id this.setData({
        audioResourceMaps: obj,
        currentGettingReferenceId:null
      })
      console.log('stop playing')
    },
    // Play playAudio(id,url) {
      const innerAudioContext = this.audioContext
      console.log(url, 'audio address')
      if(url){
        innerAudioContext.src = url
        innerAudioContext.play()
        innerAudioContext.onPlay(() => {
          console.log('Start playing')
        })
        innerAudioContext.onTimeUpdate(() => {
          console.log(innerAudioContext.duration,'total duration')   
          console.log(innerAudioContext.currentTime,'Current playback progress')
        })
        setTimeout(() => {
          console.log(innerAudioContext.duration,'total duration')   
          console.log(innerAudioContext.currentTime,'Current playback progress')
        }, 500)
        innerAudioContext.onEnded(() => {
          let obj = this.data.audioResourceMaps
          for(let item in obj){
            delete obj[item]
          }
          this.setData({
            audioResourceMaps: obj,
            currentGettingReferenceId:null
          })
          console.log('Playback completed')
        })
        innerAudioContext.onError((res) => {
          console.log(res.errMsg)
          console.log(res.errCode)
        })
      }
    }

"usingComponents": {
    "van-button": "@vant/weapp/button/index",
    "van-icon": "@vant/weapp/icon/index",
  }