main.lua

local function handleTap( event )

    print( 'dispatching to Swift' )
    local data = { name="coronaView", message="Hello from Lua!" }

    print(Runtime:dispatchEvent( data ))
    return true
end

local startText = display.newText( "START", display.contentCenterX, 200, "HelveticaNeue", 24 )
startText:addEventListener( "tap", handleTap )

--
-- Set up a listener to handle return event from Swift
--

local message = display.newText( "", display.contentCenterX, 25, "HelveticaNeue", 16 )

local function handleNativeMessage( event )
    if ( event.phase == "loaded" ) then
        print( 'corona:' .. event.name )  -- "nativeMessage"
        print( 'corona:' .. event.message )  -- "Hello from Swift!"

        message.text = event.message
    end
    return true

end


Runtime:addEventListener( "nativeMessage", handleNativeMessage )