增加3秒云服务器连接检测，连不上服务器的时候不刷新数据

wxr

2024-04-12 a155c6ce1911e995d136f08b409dd0861706a3f8

 HDL-ON_iOS/ViewController.cs

@@ -22,6 +22,13 @@
            }
        }

        // 切换到竖屏模式
        public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations()
        {
            return UIInterfaceOrientationMask.Portrait;
        }


        public override void ViewDidLoad()
        {
            base.ViewDidLoad();