UIButtons at the bottom of UIScrollView not working

Question

I created a UIScrollView in my storyboards and have added 12 UIButtons in a container View which is inside the UIScrollView.

when running on the iPhone 5s simulator,

Answer 1

Just increase the container view height and also Container view must be a subview of the scroll view and all other subviews are part of the container view.

like  Scroolview -> ContainerView--> UIButtons