iOS Question Setting the background color of B4XFloatTextField

#Region Shared Files
#CustomBuildAction: folders ready, %WINDIR%\System32\Robocopy.exe,"..\..\Shared Files" "..\Files"
'Ctrl + click to sync files: ide://run?file=%WINDIR%\System32\Robocopy.exe&args=..\..\Shared+Files&args=..\Files&FilesSync=True
#End Region

'Ctrl + click to export as zip: ide://run?File=%B4X%\Zipper.jar&Args=Project.zip

Sub Class_Globals
    Private Root As B4XView
    Private xui As XUI
    Private B4XFloatTextField1 As B4XFloatTextField
   
    'Define the bil screen(scn1) and tie it to the screen1 class
    Public scn1 As screen1
End Sub

Public Sub Initialize
   
End Sub

'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
   
    Root1.LoadLayout("MainPage")
   
End Sub

'You can see the list of page related events in the B4XPagesManager object. The event name is B4XPage.

Sub Button1_Click
    'This will call the initialization routine in the scn2 module
    scn1.Initialize
   
    B4XPages.AddPage("scn1",scn1)
   
    B4XPages.ShowPage("scn1")
   
   
    'xui.MsgboxAsync("Hello world!", "B4X")
End Sub

Sub Class_Globals
   
    Private B4XFloatTextField1 As B4XFloatTextField
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize
   
End Sub

Private Sub B4XPage_Created (Root1 As B4XView)
   
   
    Root1.LoadLayout("scn1")
   
    B4XFloatTextField1.mBase.SetColorAndBorder(Colors.Red,1,0x696969,0)
    B4XFloatTextField1.Update
   
    B4XFloatTextField1.Text = "This is screen 1"
   
End Sub