Accessing the same function in different levels(Layers) from an in game menu

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Accessing the same function in different levels(Layers) from an in game menu

(4 posts) (3 voices)

Started 2 years ago by iphoneDev
Latest reply from Codemattic

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iphoneDev
Member

Hi ,

I have an in game pushed scene(to resemble and in game menu) that calls the same function(upgradeHealth) on all levels, levels are inherited from Layer.

//this is global Layer *currentLevelPtr;
//at init of leve7 for example currentLevelPtr = self;

What I have done is creating a global pointer of the type Layer, then assign it to self in the
initializer of the level when creating it. At the pushed scene(menu) I call the function using

[currentLevelPtr upgradeHealth:250];

--This is working fine-- however, a warning from the compiler:

'warning: Layer may not respond to -upgradeHealth:'
(Messages without matching method signature will be assumed to return 'id' and accept '...' as arguments.)

Can this cause a problem later on ? I mean what are the implications of having an
unresolved warning in the project.

Many thanks in advance

Posted 2 years ago #
Dan
Member

That's basically because you're calling upgradeHealth on a Layer object, rather than your inherited object. You can cast currentLevelPtr to your inherited class to get rid of the warning.

Posted 2 years ago #
iphoneDev
Member

but how i can know the current level so i can cast the pointer
[(level7 *) currentLevelPtr upgradeHealth:250]; -->> level 1,2,3...100 i cant set the level dynamically

Posted 2 years ago #
Codemattic
Moderator

make a subclass of Layer called LevelLayer which has all the methods and properties that will be common to all your Levels. Then make a class Level7 which subclasses LevelLayer. Then:

//this is global
LevelLayer *currentLevelPtr;

Posted 2 years ago #

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