例子代码有问题

[280482431]

lib/main.dart:98:16: Error: A value of type 'Route?' can't be returned from a function with return type 'Route' because 'Route?' is nullable and 'Route' isn't.

• 'Route' is from 'package:flutter/src/widgets/navigator.dart' ('../../../Documents/flutter/flutter/packages/flutter/lib/src/widgets/navigator.dart').
  return func(settings, uniqueId);
  ^
  lib/main.dart:116:7: Error: The argument type 'Route Function(RouteSettings, String)' can't be assigned to the parameter type 'Route? Function(RouteSettings, String?)' because 'String?' is nullable and 'String' isn't.
• 'Route' is from 'package:flutter/src/widgets/navigator.dart' ('../../../Documents/flutter/flutter/packages/flutter/lib/src/widgets/navigator.dart').
• 'RouteSettings' is from 'package:flutter/src/widgets/navigator.dart' ('../../../Documents/flutter/flutter/packages/flutter/lib/src/widgets/navigator.dart').
  routeFactory,
  ^

[wangxuewen]

1.使用空安全版本
ref: 'v3.0-null-safety-release.1'

2.routeFactory函数调整为
Route? routeFactory(RouteSettings settings, String? uniqueId) {
FlutterBoostRouteFactory? func = routerMap[settings.name];
if (func == null) {
return null;
}
return func(settings, uniqueId);
}