[SOLVED] TRIM works correctly on simulator but not on device

Solar2D General Questions/Discussion
1

Hello,
If I input spaces only then click OK button, the text is trimed and “OK” is not displayed on the simulator, but on Android yes. Is there a workaroud?

local function trim(str)
	return string.gsub(str,"^%s*(.-)%s*$","%1")
end

local function touchOK(evt)
	if evt.phase=="ended" then
		fld.text=trim(fld.text)
		
		if fld.text~="" then
			display.newText("OK!",400,750,"Verdana",80)
		end
	end
	return true
end

fld=native.newTextField(400,150,770,100)

rec=display.newRect(400,600,100,100)
rec:addEventListener("touch",touchOK)
2

I use something like this:

-- Trim of spaces before/after/multiple together in middle.
local function trim(name)
    local result
    result = string.gsub(name, "%s+", " ")
    result = string.gsub(result, "^%s*", "")
    result = string.gsub(result, "%s*$", "")
    return result
end

I am not sure exactly what’s going on, but you can try this code if it works.

3

I tried others, and yours just now, it’s the same behaviour.
I don’t understand why, that’s not logic. If the string is empty, why the text is displayed??

it seems the problem comes from the pressed button, because if I write this only:

fld.text="      "
fld.text=trim(fld.text)

if fld.text~="" then display.newText("OK!",400,750,"Verdana",80) end

That’s work, nothing is displayed :thinking:

EDIT: I had an idea. I think there’s a delay between the input and it’s real value to update the string, so I did this and it works now :grinning:

local function touchOK(evt)
	if evt.phase=="ended" then
		fld.text=trim(fld.text)
		
		timer.performWithDelay(50,function()
			if fld.text~="" then
				display.newText("OK!",400,750,"Verdana",80)
			end
		end,1)
	end
	return true
end
4

I coded a better workaround :grinning:

local function touchOK(evt)
	if evt.phase=="began" then
		fld.text=trim(fld.text)
	elseif evt.phase=="ended" then
		if fld.text~="" then
			display.newText("OK!",400,750,"Verdana",80)
		end
	end
	return true
end```