UINavigationBar changes in iOS13, Part2: UISearchController
Table of Contents
In a previous article, we talk about appearance change of UINavigationBar in iOS13. Today I want to add some more changes you should know when using UINavigationBar with UISearchController.
Adding search controller can make a navigation bar disappear
In UINavigationBar changes in iOS13, Part1, I said that scroll edge appearance (transparent navigation bar) would be used only with large title navigation bar. But this is no longer a case. If you add UISearchController to a navigation bar, scroll edge appearance might be used.
The system will use scroll edge appearance when hidesSearchBarWhenScrolling set to true. So your navigation bar might become transparent even you don't use the large title appearance.
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Search bar always show
In iOS12, UISearchBar will show without a need of scrolling if you set hidesSearchBarWhenScrolling to false (Always show search bar).
But if you set hidesSearchBarWhenScrolling to true it will hide by default and reveal when you pull a scroll view down.
In iOS13, UISearchBar will always show regardless of hidesSearchBarWhenScrolling value. I think this is a good change. It makes search function front and center. Easy to discover, easy to access. Plus, it makes everything more consistency.
Demo
The following are screenshots of the difference between iOS12 and iOS13.
From left to right, small title with hidesSearchBarWhenScrolling == true, small title with hidesSearchBarWhenScrolling == false, large title with hidesSearchBarWhenScrolling == true, large title with hidesSearchBarWhenScrolling == false.
And these are animations of hiding/showing state in iOS12 and iOS13.
Conclusion
I love an obvious interface. It makes a feature you spend time coding more discoverable. I always think the search bar should show by default.
Fun fact: I used to have a search function in one of my apps hidden like the one in iOS12. Once in a while, I will receive an email asking for a search function. I stop receiving that after making the search function more obvious.
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