从弹出的视图控制器中传递数据

I have two view controllers. I'm on first, and when I press the button, second view controller is pushed onto the stack of navigation controller. Here, in second view controller I have a table view and when I tap on some rows, they are selected (like checkboxes) and some data related to that rows are added to an array. Now when I'm done with selecting, I want to go back to the first view controller and use that array. How to do that? Now my app works like this: I have a delegation protocol, then object in which I have the property array, and I can access that object and its array from whole app...but I don't really like that. Is this correct/best/simplest way to do that?I have two view controllers. I'm on first, and