控制背景播放按钮的显示

learnOnline/components/player/video.wxml

@@ -50,6 +50,7 @@
               src="/assets/images/player_audio.png"
               class="toolbar-button toolbar-button__audio"
               bindtap="onRequestBackgroundPlayback"
+              hidden="{{ !hasBackgroundAudio }}"
             ></image>
             <!-- 设置 -->
             <image

learnOnline/pages/course/player.js

@@ -31,7 +31,8 @@ Page({
     watchedTime: 0,
     watchedTimePoint: [], // 视频观看的时间点
     scrollViewHeight: 0,
-    autoplay: true
+    autoplay: true,
+    hasBackgroundAudio: false
   },
   computed: {
     hasVideo(data) {
@@ -118,6 +119,8 @@ Page({
       if (typeof cpt === 'number') {
         this.data.progress.cpt = cpt
       }
+      // 是否显示背景播放按钮
+      this.setData({ hasBackgroundAudio: this.data.progress.progress === 100 })
       // 跳转播放进度
       const player = this.selectComponent('#player')
       if (player) {

learnOnline/pages/course/player.wxml

@@ -4,6 +4,7 @@
       id="player"
       src="{{ videoPlayUrl }}"
       autoplay="{{ autoplay }}"
+      hasBackgroundAudio="{{ hasBackgroundAudio }}"
       startTime="{{ progress.cpt }}"
       bindtimeupdate="onTimeupdate"
       bindended="onEnded"