UIView with dynamic height multiple UILabel

1. Set the Lines property of both labels to 0 in interface builder.
2. Make sure there is no constraint for height of any of the labels or the uiview.
3. Make sure there are no constraints on uiview which force it to a certain size, for example, if you have a constraint on uiview for certain distance from top of superview and another constraint of certain distance from bottom of superview, it will not work.
4. Try changing the text of labels in code and height should automatically adjust.

I made a demo for you according to your requirement. Download it from below link,

Autoresize UIView and UILabel

Step by Step Guide :-

Step 1 :- Set constrain to UIView

1) Leading 2) Top 3) Trailing (From mainview)

Step 2 :- Set constrain to Label 1

1) Leading 2) Top 3) Trailing (From it's superview)

Step 3 :- Set constrain to Label 2

1) Leading 2) Top 3) Trailing (From it's superview)

Step 4 :- Most tricky give bottom to UILabel from UIView.

In Xcode 10 and above - Select your UIView and Label after that from the Align Constraint section select Bottom Edges constraint.

Step 5 :- (Optional) Set constrain to UIButton

1) Leading 2) Bottom 3) Trailing 4) Fixed Height (From mainview)

Output :-

Note :- Make sure you have set Number of lines =0 in Label property.

Edit1 :- If you want to increase size with BottomConstrain (>=) please check below Image.

I hope this info enough to understand Autoresize UIView according to UILabel's height and Autoresize UILabel According to text.