Grand central dispatch and concurrency issue?

UIKit is not thread-safe, so you should queue all UIKit operations to the main queue. It is not clear what kind of problem you have from the use of your second solution.

The second solution you have is the way to go -- there's no point in creating more tasks than is necessary (where the value of "necessary" varies depending on what you want to do of course).

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.