增加空值判断

src/components/my-audio/my-audio.vue

@@ -4,7 +4,7 @@
     <image class="pic" :src="pic" />
     <view class="info">
       <view class="song">{{ name }}</view>
-      <view class="singer">{{ singer }}</view>
+      <view class="singer">{{ singer ? singer : '暂无歌手名' }}</view>
     </view>
     <image v-if="newStatus === 1" class="btn" src="../../static/stop.png" @click="getPlay" />
     <image v-else class="btn" src="../../static/play.png" @click="getPlay" />
@@ -18,10 +18,7 @@ export default {
     pic: String,
     name: String,
     status: Number,
-    singer: {
-      type: String,
-      default: '暂无歌手名'
-    }
+    singer: String
   },
   data() {
     return {