iOS Question TextField - How can I limit ?

[cooperlegend]

I have tried using TextChanged as below (This worked fine in B4A)

Sub txtPasscode_TextChanged (OldText As String, NewText As String)
    If NewText.Length > 6 Then
        txtPasscode.Text = OldText
    End If
End Sub

But this doesn't work in b4i. Currently I have to truncate using EndEdit, but I would prefer to limit the user to inputting no more than 6 characters.

Any Ideas?

 

[Erel]

Try:
txtPasscode.Text = NewText.SubString2(0, 6)

 

[cooperlegend]

That almost works, it at first allows and shows the 7th character, then when you enter another character it then truncates back to 6 (correctly) ?!??
Quite strange...