listener for multiple text field - lua

Question

I'm trying to call a text field listener from multiple field like this page
http://docs.coronalabs.com/api/library/native/newTextField.html#listener-optional
When user start to write something in input field, handler function is called normally but closure that is located in handler is not called.
login.lua file like below:
local storyboard = require( "storyboard" )
local scene = storyboard.newScene()
-- Forward declerations
local userNameField
-- TextField Listener
local function fieldHandler( getObj )
print( "This message is showing up :) " )
-- Use Lua closure in order to access the TextField object
return function( event )
print( "This message is not showing up :( There is something wrong here!!!" )
if ( "began" == event.phase ) then
-- This is the "keyboard has appeared" event
getObj().text = ""
getObj():setTextColor( 0, 0, 0, 255 )
elseif ( "ended" == event.phase ) then
-- This event is called when the user stops editing a field:
-- for example, when they touch a different field or keyboard focus goes away
print( "Text entered = " .. tostring( getObj().text ) ) -- display the text entered
elseif ( "submitted" == event.phase ) then
-- This event occurs when the user presses the "return" key
-- (if available) on the onscreen keyboard
-- Hide keyboard
native.setKeyboardFocus( nil )
end
end -- "return function()"
end
local function userNameFieldHandler( event )
local myfunc = fieldHandler( function() return userNameField end ) -- passes the text field object
end
-- Called when the scene's view does not exist:
function scene:createScene( event )
local group = self.view
-- Create our Text Field
userNameField = native.newTextField( display.contentWidth * 0.1, display.contentHeight * 0.5, display.contentWidth * 0.8, display.contentHeight * 0.08)
userNameField:addEventListener( "userInput", userNameFieldHandler )
userNameField.font = native.newFont( native.systemFontBold, 22 )
userNameField.text = "User Name"
userNameField:setTextColor( 0, 0, 0, 12 )
end
Help please...

Answer 1

I don't know Corona, but your code is somewhat strange.
userNameFieldHandler doesn't do much, it just creates a handler calling fieldHandler and stores it in a local that is never used (myfunc). Are you sure you didn't mean this:
local function userNameFieldHandler( event )
local myfunc = fieldHandler(
function() return userNameField end ) -- passes the text field object
return myfunc --<<<<--- added return
end
and maybe when you add the event listener you meant this (note the added ()):
userNameField:addEventListener( "userInput", userNameFieldHandler() )