代码补充 wxml code  <block wx:for="{{openIdList}}" wx:key="item">     <block wx:if="{{selfOpenId === item }}">       <voip-room openid="{{item}}"         class="room{{fullScreenOpenId==item ? ' full-screen' : ''}}{{(fullScreenOpenId!='' && fullScreenOpenId!=item) ? 'hide' : ''}}"         data-openId="{{item}}" mode="{{selfOpenId === item ? 'camera' : 'video'}}" binderror="roomError"         device-position="{{cameraDirection ? 'front' : 'back'}}" catchtap="onClickVideo"></voip-room>     </block>     <block wx:else>       <voip-room openid="{{item}}"         class="room{{fullScreenOpenId==item ? ' full-screen' : ''}}{{(fullScreenOpenId!='' && fullScreenOpenId!=item) ? 'hide' : ''}}"         data-openId="{{item}}" mode="{{selfOpenId === item ? 'camera' : 'video'}}" binderror="roomError"         catchtap="onClickVideo"></voip-room>     </block>   </block> JS CODE wx.joinVoIPChat({                   roomType: "video",                   signature: res.data.result.data.signature,                   nonceStr: res.data.result.data.nonceStr,                   timeStamp: res.data.result.data.timestamp,                   groupId: res.data.result.data.groupId,                   success: function (e) {                     console.log("调用微信加入会议接口成功");                     console.log(e);                     that.setData({                       openIdList: e.openIdList                     });                     //订阅视频画面成员。对于视频房间，当成员超过两人时需进行订阅，否则只能看到最先加入房间的两人画面。                     wx.subscribeVoIPVideoMembers({                       openIdList: e.openIdList,                       success(res) {                         console.log('subscribeVoIPVideoMembers success')                       }                     })                     //监听实时语音通话成员在线状态变化事件。有成员加入/退出通话时触发回调                     wx.onVoIPChatMembersChanged(function (res) {                       console.log('onVoIPChatMembersChanged success')                       that.setData({                         openIdList: res.openIdList                       })                       //订阅视频画面成员。对于视频房间，当成员超过两人时需进行订阅，否则只能看到最先加入房间的两人画面。                       wx.subscribeVoIPVideoMembers({                         openIdList: res.openIdList,                         success(res) {                           console.log('subscribeVoIPVideoMembers success_b')                         }                       })                     })                   },                   fail: function (e) {                     console.log("调用微信加入会议接口失败");                   },                   complete: function (e) {                     console.log("调用微信加入会议接口完成");                     wx.hideLoading({                       success: (res) => {},                     })                   }                 });