Time for action – setting up our screen resolution

The old AppDelegate class logic now exists inside a file called main.lua:

1. In the IDE, open the main.lua file inside the src folder.
2. After the line where we set the animation interval, type the following:

   cc.Director:getInstance():getOpenGLView(): setDesignResolutionSize(640, 960,  cc.ResolutionPolicy.SHOW_ALL)
      local screenSize =  cc.Director:getInstance():getVisibleSize()
      local designSize = cc.size(640, 960)
      if (screenSize.width > 320) then
        cc.Director:getInstance():setContentScaleFactor(640/   designSize.width)       
        cc.FileUtils:getInstance():addSearchPath("res/hd/") 
      else
        cc.Director:getInstance():setContentScaleFactor(320/designSize.width)
        cc.FileUtils:getInstance():addSearchPath("res/sd/")         
      end

3. I designed the game for iPhone retina, and here we set the appropriate scale and asset folder for both retina and non-retina phones. Next, let's preload the sound files...