A little bit wondering of memory management on ios?

It will not do you any harm, put it that way. But.

The reason that you need to release your instance variables in the dealloc method is that the viewDidUnload method is typically only called after your view has been removed from memory because of a low memory condition. Under normal conditions the method will never be called, so if you don't release your instance variables in dealloc, when you release your view controller you will get a memory leak.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.