͜ͱ͕Ͱ͖Δ w Ξοϓͨࣸ͠ਅʹίϝϯτ Ͱ͖Δ w ࣸਅΛՃͰ͖Δ w 1VTI௨ w ݁ࠗࣜલʹʮ໌ΑΖ͘͠ ͓Ͷ͕͍͠·͢ʯͱ͔ૹΓ͔ͨͬ ͨ w ੮࣍දӾཡ w ͜Ε͔ͬͯΔͱخ͍ͣ͠ w ͓Βͤը໘ w Կ͔͋ͬͨΒ͜͜ʹදࣔͯ͠ʮಡ ΜͰͶʯ͕͔ͨͬͨ͠ ແ೦ɺ͜Ε͚ͩͰ͖ͣ
class PhotoViewerViewModel { enum State { case list([Article]) case add([Article]) case update(Article) case loading case error(String) } func refresh() { guard reachability.isReachable else { delegate?.didUpdate(.error("σʔλΛऔಘͰ͖·ͤΜͰͨ͠")) return } delegate?.didUpdate(.loading) database.load { [weak self] articles in self?.delegate?.didUpdate(.list(articles)) self?.subscribe() } } 7JFX.PEFMͰ4UBUFΛఆٛɺ%BUBCBTFͷมߋʹԠͯ͡ঢ়ଶΛߋ৽͢Δ