title: didReceiveMemoryWarning advice (too many multitasking applications in the background)?
body: <p>Please help, I don't know what I have to do with didReceiveMemoryWarning exactly. My app launched well, but when there is too many running background apps, it receives memory warning, and exit. <strong>I just want to show an alert that asks user to exit some background apps.</strong></p>
  
  <p>I have an appDelegate, in its window there is a view of my viewController,  it has another view allocated (composite) with two subviews (a XIB over an OpenGL view), and this is set to be a cameraOverlayView in the viewController.</p>
  
  <p>I tried to release the whole stuff in one at warning, but still exited. Do I have to implement didReceiveMemoryWarning in each subview? Can I somehow "forcequit" the initialization process?</p>