So far, so good! Next you need to add a few more controls to the screen so that the user can tap the UIImageView area to change the picture.
There are a couple ways you can do this, but one easy way it to create an invisible button on top of the UIImageView, and set it up so that you get a callback when the button is tapped. You can also add a UILabel underneath the picture to say “Tap to Change Picture” if there is no picture set.
So drag a Button from the library, and resize it to be the same exact size and position as the UIImageView. To make it invisible, in the fourth tab (Attributes Inspector) change the type to Custom and set it’s default Title to blank. Then in the fifth tab (Size Inspector) set the autosizing attributes to the following: