diff --git a/PicotPage.Android/Renderer/ViewPanelRenderer.cs b/PicotPage.Android/Renderer/ViewPanelRenderer.cs
index 692a590..2ca5b3d 100644
--- a/PicotPage.Android/Renderer/ViewPanelRenderer.cs
+++ b/PicotPage.Android/Renderer/ViewPanelRenderer.cs
@@ -85,7 +85,7 @@ public class CustomPagerAdapter : PagerAdapter
     {
         private ViewPanel _customViewPage;
         private Context _context;
-        private IList _views = new List<  Xamarin.Forms.View>();
+        private IList<Xamarin.Forms.View> _views = new List<Xamarin.Forms.View>();
         public CustomPagerAdapter(Context context, ViewPanel customViewPage)
         {
             _customViewPage = customViewPage;
diff --git a/PivotView/PivotPagePortable/Pivot/PivotPage.cs b/PivotView/PivotPagePortable/Pivot/PivotPage.cs
index c52f914..f3a4aeb 100644
--- a/PivotView/PivotPagePortable/Pivot/PivotPage.cs
+++ b/PivotView/PivotPagePortable/Pivot/PivotPage.cs
@@ -46,6 +46,16 @@ public PivotPage()
             _viewPanel.SelectChanged += _viewPanel_SelectChanged;
         }
 
+        public event EventHandler<SelectedPositionChangedEventArgs> MainViewChanged;
+
+        public int MainViewIndex
+        {
+            get
+            {
+                return _viewPanel.CurrentIndex;
+            }
+        }
+
         private void _viewPanel_SelectChanged(object sender, SelectedPositionChangedEventArgs e)
         {
             var index = (int)e.SelectedPosition;
@@ -54,6 +64,8 @@ private void _viewPanel_SelectChanged(object sender, SelectedPositionChangedEven
             {
                 _headerList.SelectedIndex = index;
             }
+
+            MainViewChanged?.Invoke(this, new SelectedPositionChangedEventArgs(MainViewIndex));
         }
 
         private void headerList_ItemSelected(object sender, SelectedItemChangedEventArgs e)
@@ -124,17 +136,17 @@ static void OnHeadersPropertyChnaged(BindableObject sender, object oldValue, obj
         /// <summary>
         /// PivotPage第二组成部分Views
         /// </summary>
-        public static readonly BindableProperty ViewsProperty = BindableProperty.Create("Views", typeof(IEnumerable), typeof(PivotPage), null, propertyChanged: OnViewsPropertyChnaged);
-        public IEnumerable<View> Views
+        public static readonly BindableProperty ViewsProperty = BindableProperty.Create(nameof(Views), typeof(IList<View>), typeof(PivotPage), null, propertyChanged: OnViewsPropertyChnaged);
+        public IList<View> Views
         {
-            get { return (IEnumerable<View>)this.GetValue(ViewsProperty); }
+            get { return (IList<View>)this.GetValue(ViewsProperty); }
             set { SetValue(ViewsProperty, value); }
         }
 
         static void OnViewsPropertyChnaged(BindableObject sender, object oldValue, object newValue)
         {
             var pivot = sender as PivotPage;
-            pivot._viewPanel.PanelChildren = (IEnumerable<View>)newValue;
+            pivot._viewPanel.PanelChildren = (IList<View>)newValue;
         }
     }
 }
diff --git a/PivotView/PivotPagePortable/Pivot/ViewPanel.cs b/PivotView/PivotPagePortable/Pivot/ViewPanel.cs
index 72dd508..26f1aff 100644
--- a/PivotView/PivotPagePortable/Pivot/ViewPanel.cs
+++ b/PivotView/PivotPagePortable/Pivot/ViewPanel.cs
@@ -30,10 +30,10 @@ public ViewPanel()
         /// <summary>
         /// 支持数据绑定的Child View集合
         /// </summary>
-        public static readonly BindableProperty ChildrenProperty = BindableProperty.Create(nameof(PanelChildren), typeof(IEnumerable<View>), typeof(ViewPanel), propertyChanged: OnChildrenChanged);
-        public IEnumerable<View> PanelChildren
+        public static readonly BindableProperty ChildrenProperty = BindableProperty.Create(nameof(PanelChildren), typeof(IList<View>), typeof(ViewPanel), propertyChanged: OnChildrenChanged);
+        public IList<View> PanelChildren
         {
-            get { return (IEnumerable<View>)this.GetValue(ChildrenProperty); }
+            get { return (IList<View>)this.GetValue(ChildrenProperty); }
             set { SetValue(ChildrenProperty, value); }
         }
         /// <summary>
@@ -105,7 +105,7 @@ protected override void LayoutChildren(double x, double y, double width, double
         }
 
         public event EventHandler<SelectedPositionChangedEventArgs> SelectChanged;
-        public static readonly BindableProperty CurrentIndexProperty = BindableProperty.Create("CurrentIndex", typeof(int), typeof(ViewPanel), 0);
+        public static readonly BindableProperty CurrentIndexProperty = BindableProperty.Create(nameof(CurrentIndex), typeof(int), typeof(ViewPanel), 0);
         public int CurrentIndex
         {
             get { return (int)this.GetValue(CurrentIndexProperty); }