ScrollView has ambiguous scrollable content height

Question

I am making a very basic UIScrollView test. Here is my setup It shows me the following AutoLayout error:

ScrollView has ambiguous scrollable content height 

Solution

You need to ensure you've got a chain of vertical spacing constraints from the top of the scroll view through all your elements to the bottom of the scroll view.

Once you do that, your warning/error should go away.

Comments

[Abdul Yasin]

I have given a height to the scrollview. Will it work? Or do i need to add bottom guide as well ?

[Sandy Chapman]

@AbdulYasin, no, you need the content within the scrollview to have a defined height as well. The height of the content in the scrollview can be larger or smaller than the height of the scrollview itself.

[Developer]

But then how scrollView will scroll if we set if frame equal to its contentsize??

[Sandy Chapman]

@Developer the scrollview's frame does not equal the size of the scrollview's content. If they were equal, then the scrollview would never scroll.