一、嵌套场景

多个InheritedWidget可以嵌套使用,每个管理自己的数据。

二、嵌套Provider示例

UserInfoProvider(
  name: _name,
  age: _age,
  updateUserInfo: _updateUserInfo,
  child: DetailInfoProvider(
    address: _address,
    phone: _phone,
    updateDetailInfo: _updateDetailInfo,
    child: ChildWidget(),
  ),
)

三、查找顺序

四、作用域管理

五、UserInfoProvider实现

class UserInfoProvider extends InheritedWidget {
  final String name;
  final int age;
  final String email;
  final Function(String, int, String) updateUserInfo;

  const UserInfoProvider({
    required this.name,
    required this.age,
    required this.email,
    required this.updateUserInfo,
    required Widget child,
  }) : super(child: child);

  static UserInfoProvider of(BuildContext context) {
    final UserInfoProvider? result =
        context.dependOnInheritedWidgetOfExactType<UserInfoProvider>();
    assert(result != null, 'No UserInfoProvider found');
    return result!;
  }

  @override
  bool updateShouldNotify(UserInfoProvider oldWidget) {
    return name != oldWidget.name ||
        age != oldWidget.age ||
        email != oldWidget.email;
  }
}

六、最佳实践

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