1. Create a Swift Project using Single view template.
2. Add a ViewController to the Storyboard.
3. Add ScrollView to the ViewController with Constraints set 0 for top, left, bottom and right. Leave space for the status bar at the top.
4. Add a View on top of the Scroll View. Set height of the say to 1000 and the constraints as shown.                        
5. Control drag from inner View to the main View as shown below and select equal widths.                                                                          
6. Select the ViewController and set the simulated size to freeform.
7. Set the height of the ViewController to 1000 same as set for the inner view.

You can then adjust your components over the UIScrollView normally using auto-layout.