目标C - 在切换视图控制器后，代码中创建的对象消失

I have a simple app with two views in the storyboard, with two segues connecting them together. in the viewDidLoad of each controller I programmatically create one button, and the action for that button is to switch to the other view. The main code for one of the view controllers is shown here The code for the second one is identical except for the view controller and button names.I have a simple app with two views in the story