It will not get called if you are returning 0 rows in numberOfRowsInSection method. Please check the number of rows that you return.
Given the code you've shown us there only a few possibilities. Either self. TweetsTable is nil, tweets is nil, or tweets contains no element and count is returning zero.
Now I know you say that everything is correct, but clearly something is up! You can add a bit of defensive code to detect these problems.
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.