Flutter BLOC Equatable |某些变量的例外

Question

如何排除等价类中的一些变量成员不被比较？

class MyBlocState extends Equatable {

  LocationPermission locationPermission;
  final LatLng position;

  NavigationState({

    this.locationPermission,
    this.position,
});

MyBlocState copyWith({
  LocationPermission locationPermission,
  LatLng position
}) {
 locationPermission : locationPermission ?? this. locationPermission,
 position : position ?? this. position
}

@override
List<object> get props => [
 locationPermission,
 position
];

我希望检查变量位置是否相等，但不检查 locationPermission，因此在状态小部件中即使结果相同，它仍然可以返回状态，因为即使用户给出相同的响应，我也需要捕获用户响应

Answer 1

只需从get props 中删除locationPermission。

class MyBlocState extends Equatable {

  LocationPermission locationPermission;
  final LatLng position;

  NavigationState({

    this.locationPermission,
    this.position,
});

MyBlocState copyWith({
  LocationPermission locationPermission,
  LatLng position
}) {
 locationPermission : locationPermission ?? this. locationPermission,
 position : position ?? this. position
}

@override
List<object> get props => [
 position
];