fix

static/screenIos/WXtrialInterface.html

@@ -1163,6 +1163,9 @@
       webSocketWorker.onopen = function(e) {
         console.log(e,'onopen')
       }
+      webSocketWorker.onerror = function(e) {
+        console.log(e,'onerror')
+      }
       webSocketWorker.onmessage = function (event) {
         if(flag) {
           getResidueTime();