用户下线出现提示bug

Assets/Scripts/Devices/Ble/mobile/BleMobileInterface.cs

@@ -456,6 +456,8 @@ namespace Assets.Scripts.Ble
 
         public void Dispose()
         {
+            if (bleMobileThread == null)
+                return;
             bleMobileThread.ManagerInitialized -= BleMobileThread_ManagerInitialized;
             bleMobileThread.ManagerStatusChanged -= ManagerStatusChanged;
             bleMobileThread.ScanInfoReceived -= WatcherScanInfoReceived;