2021-05-17 1.在阿廖分支基础上增加iOS乐橙可视对讲功能，目前呼叫还有一点问题，偶尔会闪退，目前还没定位到原因

JLChen

2021-05-17 42fad29b1e280b512452f5552d1e9ce98474252e

 HDL_ON/UI/MainPage.cs

@@ -346,6 +346,7 @@
            int result = 0;
            Application.RunOnMainThread(() =>
            {
                
                if (BaseView.ChildrenCount>1)
                {
                    var view = BaseView.GetChildren(BaseView.ChildrenCount - 1);