Need help with Lua class from module

I keep getting an "attempt to index global 'Foo' (a nil value)" error.

Say I want to create a class using a module named 'Foo'. To create an instance of the Foo class, I want to call Foo:new() from main.lua. I know I have to work with metatables and all that, but the error appears to precede that stuff.

If foo.lua is basically

module(...,package.seeall)
 
Foo = {}
Foo_mt = {__index = Foo}
 
function Foo:new(params)
local self = {}
setmetatable(self, Foo_mt)
...
return self
end

Nope, should be

1	foo.Foo:new()

on ph, but hopefully this helps

file main.lua
.........
require("foo")
testobj = foo:new()
.....

file foo.lua
.......
module(...,seeall)

function new()
local somevar =1
fooobject = display.newRect(params here)
fooobject.newvar = somevar
return fooobject
end

.....
hopefully that made sense, i am using iphone and can see 4 lines :) and cant check, all from memory, and im a noob.

the module lua is referred to as foo in main.lua, so foo:new() calls the new function in foo.lua that returns a modified display object

regards :)

I'll give this a try, thanks. I'd be interested in what you learned about 'require', too.

thx

check out my particle fx module source code i uploaded last night, uses class modules and config objects

Done. Read it here.

views:1791 update：2011/10/5 21:23:48


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