Director Class Issue?

I'm trying to add a feature to my app where the user can double tap the screen to get to the menu. I'm using the director class, but it's not working out for me. Did I do anything wrong?

local director = require("director");
 
local mainGroup = display.newGroup();
-- I put the above code first in my app, then the body, then the following...
 
local function main ()
 
        mainGroup:insert(director.directorView);
 
        director:changeScene("Menu");
 
        return true;
 
end
 
 
local onTap = function(event)
 
                if 2 == event.numTaps then
 
                main();
                                                
                return true;
                end
        end
 
Runtime:addEventListener("tap", onTap)

I think you will have to create a tap adding up function. eg:

local taps = 0
local function countTaps(event)
    if event.phase == "began" then
     taps = taps + 1
    end
 
  if taps == 2 then
   main()
  end
 
end
Runtime:addEventListener("tap", countTaps)
 
local function main ()
 
        mainGroup:insert(director.directorView);
 
        director:changeScene("Menu");
 
        return true;
 
end

Ugh, that doesn't work either, my app just freezes and says something about assertion. My app is an alarm clock so far...
Argh!

Runtime error
        assertion failed!
stack traceback:
        [C]: ?
        [C]: in function 'assert'
        ?: in function 'getOrCreateTable'
        ?: in function 'addEventListener'
        ?: in function 'addEventListener'
        ...blah\blah\blah\Alarm Clock\Aclock.lua:93: in mRuntime
error: assertion failed!
stack traceback:
        [C]: ?
        [C]: in function 'assert'
        ?: in function 'getOrCreateTable'
        ?: in function 'addEventListener'
        ?: in function 'addEventListener'
        ...blah\blah\blah\Alarm Clock\Aclock.lua:93: in main chun
k
        [C]:Runtime error
        ...blah\blah\blah\Alarm Clock\director.lua:303: ERROR: tabl
e expected. If this is a function call, you might have used '.' instead of ':'
stack traceback:
        [C]: ?
        [C]: in function 'insert'
        ...Blah\Blah\Blah\Alarm
 
 
 
 
<lua>
-- line 93
Runtime:addEventListener("tap", countTaps)
 
-- line 303 in Director.lua file 
currView:insert(currScreen)

Your main.lua should be something like below... Note line no 31 below.

display.setStatusBar( display.HiddenStatusBar )
 
---------------------------------------------------------------
-- Import director class
---------------------------------------------------------------
 
director = require("director")
 
---------------------------------------------------------------
-- Create a main group
---------------------------------------------------------------
 
local mainGroup = display.newGroup()
---------------------------------------------------------------
-- Main function
---------------------------------------------------------------
 
local function main()
 
        -----------------------------------
        -- Add the group from director class
        -----------------------------------
        
        mainGroup:insert(director.directorView)
 
        -----------------------------------
        -- Change scene without effects
        -----------------------------------
        
        director:changeScene("Aclock.lua")
        
        -----------------------------------
        -- Return
        -----------------------------------
        
        return true
end
 
---------------------------------------------------------------
-- Begin
---------------------------------------------------------------
 
main()
 
-- It's that easy! :-)

That doesn't seem to work out well or maybe I did something wrong.

This is my tap function below, I think it should work but I just need an event listener. Do i need anything else in my file from the director class?

local function changeScene(event)
         
                 if (2 == event.numTaps) then
 
         director:changeScene("menu")
                                                
         
         end
end

views:1716 update：2011/10/2 9:44:12


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