小编Meh*_*san的帖子

我面临这个问题。我怎么解决这个问题。请帮我。

Error: Couldn't resolve the package 'intl' in 'package:intl/intl.dart'.\nlib/screens/chat.dart:4:8: Error: Not found: 'package:intl/intl.dart'\nimport 'package:intl/intl.dart';\n       ^\nlib/screens/chat.dart:98:13: Error: 'DateFormat' isn't a type.\n      final DateFormat date_formatter = DateFormat('yyyy-MM-dd');\n            ^^^^^^^^^^\nlib/screens/chat.dart:99:13: Error: 'DateFormat' isn't a type.\n      final DateFormat time_formatter = DateFormat('hh:ss');\n            ^^^^^^^^^^\nlib/screens/chat.dart:98:41: Error: The method 'DateFormat' isn't defined for the class '_\nChatState'.\n - '_ChatState' is from 'package:ecommerce_flutter/screens/chat.dart' ('lib/screens\n/chat.dart').\nTry correcting the name to the name of an existing method, or defining a method named 'Dat\neFormat'.\n      final DateFormat date_formatter = DateFormat('yyyy-MM-dd');\n                                        ^^^^^^^^^^\nlib/screens/chat.dart:99:41: Error: The method 'DateFormat' …