CODEWITHSUNDEEP
luacoronasdk
Wayra
Wayra

Reputation: 63

Execute function one time into "enterFrame"

I want to make an one function execute for one time into the loop Game,

function loopGame(event)
       if c1 == true then
             ---Execute one function
               comp()
        end
end

The problem is that i put this loopGame into the Runtime with "enterFrame", and the loopGame is exec for frame, then comp is execute more than 100 times.

I want a only execute comp a one time.

Thanks

Upvotes: 2

Views: 857

Answers (4)

Krishna Raj Salim
Krishna Raj Salim

Reputation: 7390

Just make the flag c1=false after calling the comp() method, as: 

function loopGame(event)
    if c1 == true then
      --Execute one function
        comp()
        c1 = false     -- Just add this line and try
     end
end

Keep Coding.................. :)

Upvotes: 3

Alex
Alex

Reputation: 1232

What about having two functions, one that calls comp, and the other which doesn't:

function loopGameAfter(event)
       ... other stuff ...
end

function loopGameOnce(event)
       comp()
       ... other stuff ...
       Runtime:removeEventListener("enterFrame", loopGameOnce)
       Runtime:addEventListener("enterFrame", loopGameAfter)
end

Upvotes: 2

Lukis
Lukis

Reputation: 652

If you need it to run once, don't use "enter frame" try this:

function loopGame(event)
   if c1 == true then
         ---Execute one function
           comp()
    end
end

Runtime:addEventListener( "goToLoopGame", loopGame )

And place the dispatch wherever you want it to start the loopGame function:

Runtime:dispatchEvent({ name = "goToLoopGame" })

Upvotes: 3

Paul Kulchenko
Paul Kulchenko

Reputation: 26744

You can add an upvalue or a global value to keep indicator if the function has already been called:

local executed = false -- this will be an upvalue for loopGame function
function loopGame(event)
       if c1 == true and not executed then
             ---Execute one function
             comp()
             executed = true -- set the indicator
        end
end

Another option is to use the function itself as the indicator; if it's not used anywhere else (for example, it only does some initialization once), then you can set the function to nil after it's done (and save some memory):

function loopGame(event)
       if c1 == true and comp then
             ---Execute one function
             comp()
             comp = nil
        end
end

Upvotes: 3

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