Button not clickable in Swift - swift

I've got screen layout as shown in the screenshot below.
All looks good on screen but the button just won't react to any user input - i.e. connected #IBAction doesn't get triggered.
I believe that a specific constraint is causing the issue but I can't figure out why and they all look healthy to me.
Can anyone spot it or make out what the problem is?
Thanks for your help in advance!

As pointed out by #matt, I had a missing height constraint for the surrounding Container View. Once I added that the button did respond to user input again. Cheers #matt!!

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I think there is probably some correct way to do this, but still not seeing it.
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Cheers
Jason
Have worked out how to go forward with this, incase anyone else has the same issue, use the useAutocomplete hook, and then render it however you want too.

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The one which i tried is correct, but the positive values is for scrolling down.
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Aha! seems found the answer.
I viewed this post and had a try, and it works.
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Please also make sure that User Interaction Enabled is checked in .xib file
I also had a problem with an unscrollable UITextView, but the other answers here didn't help (granted it was a special case: I only needed to scroll when the app was viewed horizontally).
Just in case anyone has a similar problem and lands here: what did help me was to activate vertical Autosizing (Size Inspector under View) for the textview.
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I have no idea how to code this.Is there anyone help me? Any code snippets would be great help.Thanks a lot.
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you can now see how to properly do it in an
example by apple.