<cover-view slot="callout">           <cover-view  class="customCallout" marker-id="{{item}}" >             <cover-image class="icon" src="/image/voice.png"></cover-image>             <cover-view>              <button bindtap="testBtn">aaa</button>             </cover-view>           </cover-view>       </cover-view>

小程序的map组件的marker弹出的气泡中添加按钮，按钮的 bindtap 事件不被触发。