iOS Question "Hide back button" at the properties of Main in Visual Designer

[Baris Karadeniz]

There is a "Hide back button" selection at the properties of Main in the Visual Designer. What is the purpose of this "Back button"?

 

[Erel]

Create a new project and run this code:

Sub Process_Globals
   Public App As Application
   Public NavControl As NavigationController
   Private Page1, Page2, Page3 As Page
End Sub

Private Sub Application_Start (Nav As NavigationController)
   NavControl = Nav
   Page1.Initialize("Page1")
   Page1.Title = "Page 1"
   Page1.RootPanel.Color = Colors.Red
   NavControl.ShowPage(Page1)
   Page2.Initialize("page2")
   Page2.Title = "Page 2"
   Page2.Prompt = "You cannot go back"
   Page2.RootPanel.Color = Colors.Green
   Page2.HideBackButton = True '<-------------------
   Page3.Initialize("page3")
   Page3.Title = "Page 3"
   Page3.Prompt = "You can go back"
   Page3.RootPanel.Color = Colors.Blue
End Sub

Sub Page1_Click
   NavControl.ShowPage(Page2)
End Sub

Sub Page2_Click
   NavControl.ShowPage(Page3)
End Sub

Click on the screen to move from page 1 to 2 and from 2 to 3.