Xamarin iOS: Auto Layout within scroll view?

Question

I have a scrollView on my storyboard on which I have added top, left, right, bottom constraints in order for it to resize automatically in accordance with different screen

Answer 1

It is a little complicated to explain.

As we know , before the autolayout get working, we should set constraints on them , according to those constraints the compiler can determine the Frame (position and size) on controls.

However, UIScrollView is a bit of different from UIView. In general, we just need to set left,right,top,bottom , but in UIScrollView, it has a definition called contentSize which determines the actual size of scrollview. so the constraints we set above is not enough.

So, as a workaround ,we add a container view inside the scrollview to determine contentSize.

1. Constraint on scrollview (green area in the following gif)

2. Constraint on container view.(red area in the following gif)

pay attention: we set additional width (equal to scrollview) in order to indicate the the width is fixed , means we can't scroll horizontally but vertical orientation is allowed.

3. Constraint on inner view(blue area in the following gif)

Test result :

iPhone5S

iPad Air2