ADDEVENTLISTENER - listener is nil

Solar2D Widgets
#1

I’m getting an error when adding an Event Listener. the error occurs on the last line of the following code:

ERROR:

Nov 17 06:27:21.976: Runtime error

addEventListener: listener cannot be nil: nil

[abridged]

– CATEGORY TEXTBOX

txtData_new= native.newTextField( rectData.x,txtLabel_new.y+1,rectData.width,var.fontSizeToUse * textFieldSizeCorrectForApple())

txtData_new.placeholder = “(new Category)”

txtData_new.hasBackground=false

txtData_new.background = {unpack(var.displayObjectSettings.setFillColorBkgData)}

txtData_new.height = var.displayObjectSettings.height

txtData_new:setTextColor (unpack(var.colorBLACK))

txtData_new.font = native.newFont( native.systemFont, var.fontSizeToUse )

txtData_new.strokeWidth = 0

grp:insert(txtData_new)

– listeners

txtData_new:addEventListener( “userInput”, textListener )

The above is generic code that runs exactly as above in three other .lua files, none of which generates this error.

The error occurs in the CS even when I start fresh, ie, it’s virtually the first screen I encounter. i’ve re-pasted the code from the .lua files which work fine - but still the error persists. there does not appear to be an typos.

What can be possible issues that causes textListener to become nil?

thanks very much.

Seth

#2

Did you ever define a textListener() function? If that’s all the code you have, it will return as nil.

#3

Tom, that was it. I overlooked adding the textListener( event ) function to this .lua file, whereas my “good” examples all had it.

My bad. thanks for the advice.

Seth

#4

Did you ever define a textListener() function? If that’s all the code you have, it will return as nil.

#5

Tom, that was it. I overlooked adding the textListener( event ) function to this .lua file, whereas my “good” examples all had it.

My bad. thanks for the advice.

Seth