timothycosta

struct StateUpdatedPreferenceKey: PreferenceKey {
	static var defaultValue: Int = Int.min
	static func reduce(value: inout Int, nextValue: () -> Int) {
		value = nextValue()
	}
}

struct StateUpdated: View {

timothycosta

/// TrackedValue is a property wrapper that allows you to work around the
/// lack of didSet when working with SwiftUI.
/// Explanation and example usage at: https://stackoverflow.com/a/60145397/467209
@propertyWrapper
struct TrackedValue<Tracked, Value>: DynamicProperty {
	var trackedHolder: State<ValueHolder<Tracked>>
	var valueHolder: State<ValueHolder<Value>>

	init(wrappedValue value: Value, tracked: Tracked) {
		self.trackedHolder = State(initialValue: ValueHolder(tracked))

timothycosta

func animation(from notification: Notification) -> Animation? {
	guard
	  let info = notification.userInfo,
	  let duration = info[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double,
	  let curveValue = info[UIResponder.keyboardAnimationCurveUserInfoKey] as? Int,
	  let uiKitCurve = UIView.AnimationCurve(rawValue: curveValue)
	else {
		return nil
	}