升级到最新版本后出现颤振错误

Question

recently updated my flutter to v2.5.3 and I'm getting the following error :

371:41: Error: The getter 'subhead' isn't defined for the class 'TextTheme'.

• 'TextTheme' is from 'package:flutter/src/material/text_theme.dart' ('/C:/src/flutter/packages/flutter/lib/src/material/text_theme.dart'). Try correcting the name to the name of an existing getter, or defining a getter or field named 'subhead'. ? Theme.of(context).textTheme.subhead ^^^^^^^ ../../../../AppData/Local/Pub/Cache/hosted/pub.dartlang.org/searchable_dropdown-1.1.3/lib/searchable_dropdown.dart:374:16: Error: The getter 'subhead' isn't defined for the class 'TextTheme'.
• 'TextTheme' is from 'package:flutter/src/material/text_theme.dart' ('/C:/src/flutter/packages/flutter/lib/src/material/text_theme.dart'). Try correcting the name to the name of an existing getter, or defining a getter or field named 'subhead'. .subhead ^^^^^^^

Answer 1

The error is somewhat self explanatory: The subhead property no longer exists in newer versions of the TextTheme , as per the 2018 Material Design guidelines.

If I'm not mistaken you should instead use subtitle1 as a closest replacement, but feel free to take a look at the Flutter documentation to find out which property to use instead.

See also this other SO question that also uses subhead :

How to use Flutter AppTheme TextTheme without overriding automatic text color