小程序实现背景音乐播放和暂停

<button bindtap='click'>click me</button>

click(){
 wx.navigateTo({
 url: '../index/index',
 })
 },

<!-- 背景音乐 -->
<view class='bgmView' catchtap='BGM'>
 <image wx:if='{{bgm}}' class='bgmImg {{bgmImgAni}}' src='/images/kaishi.png'></image>
 <image wx:else class='bgmImg' src='/images/zanting.png'></image>
</view>

/* 背景音乐 */

.bgmView {
 position: fixed;
 top: 20rpx;
 right: 20rpx;
 z-index: 99;
}

.bgmImg {
 width: 70rpx;
 height: 70rpx;
}

.bgmImgAni {
 animation: jumpball 4s infinite linear;
}

@keyframes jumpball {
 100% {
 transform: rotate(360deg);
 }

// 背景音乐
const innerAudioContext = wx.createInnerAudioContext()
Page({
 /**
 - 页面的初始数据
 */
 data: {
 mp3: 'http://ws.stream.qqmusic.qq.com/M500001VfvsJ21xFqb.mp3?guid=ffffffff82def4af4b12b3cd9337d5e7&uin=346897220&vkey=6292F51E1E384E061FF02C31F716658E5C81F5594D561F2E88B854E81CAAB7806D5E4F103E55D33C16F3FAC506D1AB172DE8600B37E43FAD&fromtag=46',

 // 背景音乐
 bgm: false,
 },

 // 背景音乐
 BGM: function(e) {
 let that = this;
 if (that.data.bgm) {
  that.setData({
  bgm: false,
  })
  innerAudioContext.pause(); /** 暂停音乐 */

 } else {
  that.setData({
  bgm: true,
  bgmImgAni: "bgmImgAni"
  })
  
  // 播放音乐
  innerAudioContext.autoplay = true
  innerAudioContext.loop = true
  innerAudioContext.src = that.data.mp3;
  innerAudioContext.play()
 }
 },
 /**
 - 生命周期函数--页面卸载时
 */
 onUnload() {
 wx.setStorageSync("bgm", this.data.bgm)
 },
 /**
 - 生命周期函数--监听页面加载
 */
 onLoad: function(e) {
 var bgm = wx.getStorageSync("bgm")
 this.setData({
  bgm
 })
 },
})