Update README.md

README.md

@@ -28,11 +28,69 @@ public MainWindow()
   ViewManager.Instance.MainRichView.SwitchView(new MainView());
 }
 ```
-The second step is to initialize a Unicorn.ViewManager.Dialog or Unicorn.ViewManager.Flyout,you can inherit it in xaml,when you have a Unicorn.ViewManager.Dialog or Unicorn.ViewManager.Flyout, you can display it with ViewManager.Instance.Show(PopupItem item) method.
+The second step is to initialize a Unicorn.ViewManager.Dialog or Unicorn.ViewManager.Flyout,you can inherit it in xaml,when you have a Unicorn.ViewManager.Dialog or Unicorn.ViewManager.Flyout,.
+you can display it with ViewManager.Instance.Show(PopupItem item) method.
 ```csharp
-ViewManager.Instance.Show(new FullScreenDialog());--FullScreenDialog is my Dialog instance inherit Dialog
---OR
-ViewManager.Instance.Show(new LeftFlyout());--LeftFlyout is my flyout instance inherit Flyout
+ViewManager.Instance.Show(new FullScreenDialog());//FullScreenDialog is my Dialog instance inherit Dialog
+//OR
+new FullScreenDialog().Show();//at default main view stack
+//OR
+new FullScreenDialog().Show(IPopupItemContainer );//IPopupItemContainer is a interface
+//OR
+new FullScreenDialog().ShowAsModal();//at default main view stack
+//OR
+new FullScreenDialog().ShowAsModal(IPopupItemContainer );//at custom IPopupItemContainer
+```
+you can close it like that.
+```csharp
+ViewManager.Instance.Close(Dialog dialog);//FullScreenDialog is my Dialog instance inherit Dialog
+//OR
+dialog.Close();
+```
+
+## View's events
+Each view item has four events, they are 'Showing','Shown','Closing','Closed'.
+'Showing','Closing' can be canceled. you can use it like that:
+```csharp
+public partial class DialogWithEvent
+{
+    public DialogWithEvent()
+    {
+        InitializeComponent();
+        this.Showing += DialogWithEvent_Showing;
+        this.Shown += DialogWithEvent_Shown;
+        this.Closing += DialogWithEvent_Closing;
+        this.Closed += DialogWithEvent_Closed;
+    }
+
+    private void DialogWithEvent_Closed(object sender, EventArgs e)
+    {
+        MessageDialogBox.Show("该Dialog已彻底关闭，并已从视图栈移除，可在此事件处理中处理一些释放问题", "信息", MessageBoxButton.OK, MessageBoxImage.Information);
+    }
+
+    private void DialogWithEvent_Closing(object sender, System.ComponentModel.CancelEventArgs e)
+    {
+        var msresult = MessageDialogBox.Show("Dialog With Event 准备关闭，此时可以取消，是否继续关闭", "提示", MessageBoxButton.YesNo, MessageBoxImage.Question);
+        if (msresult == MessageBoxResult.No)
+        {
+            e.Cancel = true;
+        }
+    }
+
+    private void DialogWithEvent_Shown(object sender, EventArgs e)
+    {
+        MessageDialogBox.Show("该Dialog已显示完成，可在此事件处理中处理一些加载问题", "信息", MessageBoxButton.OK, MessageBoxImage.Information);
+    }
+
+    private void DialogWithEvent_Showing(object sender, System.ComponentModel.CancelEventArgs e)
+    {
+        var msresult = MessageDialogBox.Show("Dialog With Event 准备显示，此时可以取消，是否继续显示", "提示", MessageBoxButton.YesNo, MessageBoxImage.Question);
+        if (msresult == MessageBoxResult.No)
+        {
+            e.Cancel = true;
+        }
+    }
+}
 ```
 See more details in the demo.