class Parent { var child: Child init(child: Child) } extension Parent: Autohority {}
protocol Authority: AnyObject {} class Child { weak var autority: Authority? init(authority: Authoority) } こうかですね↑ (edited)class Parent { var child: Child init(child: Child) } extension Parent: Autohority {}
protocol Authority: AnyObject {} class Child { weak var autority: Authority? init(authority: Authoority) } こうかですね↑ (edited)Parent 作るのに Child 必要、でも Child を作るのに Authority として Parent が必要