iCloud > Key-Value Storage 使い方

初期化

swift

storage = NSUbiquitousKeyValueStore()
prop1 = storage.double(forKey: "prop1") // シリアライズしたデータの場合は .data()
storage.syncronize()

値の変更を通知

swift

storage.set(value, forKey: "prop1")
storage.synchronize()

値の変更通知を受け取る

swift

func valueReceived() async {
	let center = NotificationCenter.default
	let name = NSUbiquitousKeyValueStore.didChangeExternallyNotification
	
	for await notification in center.notifications(named: name, object: storage) {
		if notification.name == name {
			await MainActor.run {
				prop1 = storage.double(forKey: "prop1")
			}
		}
	}
}

View 側からはこのように

swift

...
.task {
	await appData.valueReceived()
}