I want to learn composer.
Does Composer support these functions?
package.seeall (deprecated)module() (deprecated)
If you are making your own external modules, you can still use the package.seeall and module() setup but it’s not recommended. When you require a file (even with Composer) it won’t care which way the module is built. Deprecated means it may be removed in future releases so unless you have a strong reason to use the older module style, I would recommend using the newer method.
local MODULE = {} – Modules are just tables that get required.
MODULE.someNumber = 10
MODULE.someString = “Hello”
function MODULE.someFunction( param, list ) – a function that doesn’t care about it’s object
…
end
function MODULE:someObjectFunction( param, list) – a function with the reference to the object (self) being passed in)
– self is the instance of this object
end
return MODULE
Most people use a simple “M” to represent MODULE since thats too much typing, i.e.:
local M = {}
function M.someFunction() … end
return M
That’s all you need to define a module.
[lua]I am using storyboard at the moment.
I try to upgrade some deprecated modules
I create a module
–islaMo.lua
local islaTa = {}
function islaTa.newIsland(params)
local isla = display.newImageRect( “_Assets/Images/wisla.png”, 98,68 )
isla.x=params.x
isla.y=params.y
end
return islaTa
—**************************************************–
this is my options.lua scene
local island =require(“islaMo”)
function scene:createScene( event )
local group = self.view
local islandOne =island.newIsland{
x = 250,
y = 25
}
group:insert(islandOne)
end
When I put “group:insert(islandOne)”, it doesnt work.
If I dont put “group:insert(islandOne)” it works, but the image is in any scene.
[/lua]
Perhaps something like this:
--islaMo.lua local islaTa = {} function islaTa.newIsland(params) local isla = display.newImageRect( "\_Assets/Images/wisla.png", 98,68 ) isla.x=params.x isla.y=params.y return isla end return islaTa
The last return returns the islaTa table for the require to work. However when you want to run newIsland() you need it to return the display object you’re creating.
Rob
thanks,
It works now.
another question
if I want to remove from memory the module , I have to use
package.loaded[“islaTa”] = nil ?
I believe that is correct.
I added physics to the module, but I have a problem When I create an island in the scene levelOne.
When I Leave the scene, the physics of "islandOne " is still there .
the physics is not removed
module islaMo
[lua]
local islaTa = {}
function islaTa.newIsland(params)
local isla = display.newImageRect( “_Assets/Images/wisla.png”, 98,68 )
isla.x=params.x
isla.y=params.y
-
physics.addBody(isla,“static”,{ density=3.0, friction=0.5, bounce=0.3,radius=20 } )
return isla
end
return islaT
–**scene – levelOne
local island =require(“islaMo”)
function scene:createScene( event )
local group = self.view
local islandOne =island.newIsland{
x = 250,
y = 225
}
group:insert(islandOne)
end
[/lua]
If you are making your own external modules, you can still use the package.seeall and module() setup but it’s not recommended. When you require a file (even with Composer) it won’t care which way the module is built. Deprecated means it may be removed in future releases so unless you have a strong reason to use the older module style, I would recommend using the newer method.
local MODULE = {} – Modules are just tables that get required.
MODULE.someNumber = 10
MODULE.someString = “Hello”
function MODULE.someFunction( param, list ) – a function that doesn’t care about it’s object
…
end
function MODULE:someObjectFunction( param, list) – a function with the reference to the object (self) being passed in)
– self is the instance of this object
end
return MODULE
Most people use a simple “M” to represent MODULE since thats too much typing, i.e.:
local M = {}
function M.someFunction() … end
return M
That’s all you need to define a module.
[lua]I am using storyboard at the moment.
I try to upgrade some deprecated modules
I create a module
–islaMo.lua
local islaTa = {}
function islaTa.newIsland(params)
local isla = display.newImageRect( “_Assets/Images/wisla.png”, 98,68 )
isla.x=params.x
isla.y=params.y
end
return islaTa
—**************************************************–
this is my options.lua scene
local island =require(“islaMo”)
function scene:createScene( event )
local group = self.view
local islandOne =island.newIsland{
x = 250,
y = 25
}
group:insert(islandOne)
end
When I put “group:insert(islandOne)”, it doesnt work.
If I dont put “group:insert(islandOne)” it works, but the image is in any scene.
[/lua]
Perhaps something like this:
--islaMo.lua local islaTa = {} function islaTa.newIsland(params) local isla = display.newImageRect( "\_Assets/Images/wisla.png", 98,68 ) isla.x=params.x isla.y=params.y return isla end return islaTa
The last return returns the islaTa table for the require to work. However when you want to run newIsland() you need it to return the display object you’re creating.
Rob
thanks,
It works now.
another question
if I want to remove from memory the module , I have to use
package.loaded[“islaTa”] = nil ?
I believe that is correct.
I added physics to the module, but I have a problem When I create an island in the scene levelOne.
When I Leave the scene, the physics of "islandOne " is still there .
the physics is not removed
module islaMo
[lua]
local islaTa = {}
function islaTa.newIsland(params)
local isla = display.newImageRect( “_Assets/Images/wisla.png”, 98,68 )
isla.x=params.x
isla.y=params.y
-
physics.addBody(isla,“static”,{ density=3.0, friction=0.5, bounce=0.3,radius=20 } )
return isla
end
return islaT
–**scene – levelOne
local island =require(“islaMo”)
function scene:createScene( event )
local group = self.view
local islandOne =island.newIsland{
x = 250,
y = 225
}
group:insert(islandOne)
end
[/lua]