Issue
@override
Widget? buildLeading(BuildContext context) {
return IconButton(
icon: AnimatedIcon(
icon: AnimatedIcons.menu_arrow,
progress: transitionAnimation,
),
onPressed: () {
close(context, null);
},
);
}
Null is causing the trouble
Pls solve this flutter issue as soon as possible
Solution
It’s happening because of the flutter null safety feature
try this,
onPressed: () {
close(context, '');
},
pass the empty string, because of the flutter null safety you can not assign null values.
Answered By – Akshay Kaneriya
Answer Checked By – Dawn Plyler (FlutterFixes Volunteer)