A CupertinoLocalizations delegate that supports the zh_CN locale was not found.

携手创作，共同成长！这是我参与「掘金日新计划 · 8 月更文挑战」的第3天

localizationsDelegates: const [
          GlobalMaterialLocalizations.delegate,
          GlobalWidgetsLocalizations.delegate,
        ],

改为

localizationsDelegates: GlobalMaterialLocalizations.delegates,