WoWInterface - Creating frames with text

Text stacking on top of each other usually means you are creating a new frame/fontstring each time you call the function when you want to re-use existing frames as much as possible. Something like:

Lua Code:

local f1 = CreateFrame("Frame",nil,UIParent)
f1:SetWidth(1) 
f1:SetHeight(1) 
f1:SetAlpha(.90);
f1:SetPoint("CENTER",650,-100)
f1.text = f1:CreateFontString(nil,"ARTWORK") 
f1.text:SetFont("Fonts\\ARIALN.ttf", 13, "OUTLINE")
f1.text:SetPoint("CENTER",0,0)
f1:Hide()
 
local f2 = CreateFrame("Frame",nil,UIParent)
f2:SetWidth(1) 
f2:SetHeight(1) 
f2:SetAlpha(.90);
f2:SetPoint("CENTER",650,-100)
f2.text = f2:CreateFontString(nil,"ARTWORK") 
f2.text:SetFont("Fonts\\ARIALN.ttf", 13, "OUTLINE")
f2.text:SetPoint("CENTER",0,0)
f2:Hide()
 
local function displayupdate(show, message)
    if show == 1 then
        f1.text:SetText(message)
        f1:Show()
        f2:Hide()
    elseif show == 2 then
        f2.text:SetText(message)
        f2:Show()
        f1:Hide()
    else
        f1:Hide()
        f2:Hide()
    end
end
 
displayupdate(1, "|cffffffffmyobjective1")
--or 
displayupdate(2, "|cffffffffmyobjective2")
--or 
displayupdate() -- to just hide both
--or possibly display both objectives in the one fontstring
displayupdate(1, "myobjective1\nmyobjective2")
 
--To use variables:
local objective1 = "myobjective1"
local objective2 = "myobjective2"
displayupdate(1, objective1.."\n"..objective2)

If you are just creating a mechanism to display a changing message then you probably only need one frame.