Storyboard - dynamically change height of UIView

Question

popup1

popup2

Is it possible to create single popup in storyboard & dynamically change - decrease/increase their height when error occurs (as shown in popup2)

I expect a correct approach to create such view.

Answer 1

One way to achieve this easily is by using a vertical UIStackView in interface builder. For example, I have a simple stack view set up that contains two labels:

Now, in your view controller you can simply set your error label to hidden or not and the stack view will dynamically take care of the rest. eg:

Without hiding anything:

Hiding error label:

[_errorLabel setHidden:YES];

Answer 2

You can do it. Just put Error view in the middle of the popup and when error occurs change height of this view (error, heightConstraint.constant = 50 , for example).

Then call

[self.view setNeedsUpdateConstraints];
[self.view updateConstraintsIfNeeded];

But important to note, that you should configure all constraints correctly that the popup view is stretched properly.