Suggestion: CupertinoSliverNavigationBar allow forcing condensed title #59525
Description
Use case
See: iOS 13 Settings app search, App Store Search, or News app's Following tab search.
While searching and viewing results, the title is hidden.
My thoughts were something like this:
Widget _buildSliverBar(BuildContext context) {
return CupertinoSliverNavigationBar(
middle: _isSearching
? TextField(
autofocus: true,
controller: _filter,
decoration: InputDecoration(
hintText: 'Search by name...', border: InputBorder.none),
)
: null,
largeTitle: _isSearching ? null : _buildTitle(),
trailing: IconButton(
icon: Icon(_isSearching ? Icons.clear : Icons.search),
onPressed: () {
setState(() {
_isSearching = !_isSearching;
if (!_isSearching) {
_resetTitle();
}
});
},
),
);
}Alternatives: The built-in iOS apps that I mentioned probably actually behave by hiding the title bar and having a separate pinned search bar, e.g. SliverPersistentHeader. SliverPersistentHeader, however, doesn't seem to be very easily extensible.
SliverAppBar has a bottom option for easily appending a widget as well as allowing flexibleSpace (analogous to largeTitle) to be set to null, while placing widgets in title (analogous to middle).
Proposal
Proposal:
Apple News app
