class NotificationCenter.Notifications An asynchronous sequence of notifications generated by a notification center.
A notfiication name. The sequence includes only notifications with this name.
Instance Method
インスタンスメソッド
notifications(named:
notifications(named:object:)
Returns an asynchronous sequence of notifications produced by this center for a given notification name and optional source object.
Availability 有効性
- iOS 15.0+
- iPadOS 15.0+
- macOS 12.0+
- Mac Catalyst 15.0+
- tvOS 15.0+
- watchOS 8.0+
- Xcode 13.0+
Technology
- Foundation ファウンデーション
Declaration 宣言
func notifications(named name: Notification.Name, object: AnyObject ? = nil) -> NotificationCenter .NotificationsParameters パラメータ
nameobjectA source object of notifications. Specify a sender object to deliver only notifications from that sender. When
nil, the notification center doesn’t consider the sender as a criteria for delivery.
Return Value 戻り値
An asynchronous sequence of notifications from the center.
Discussion 議論
Use this method to receive notifications from the center as an Async. You iterate over this sequence with for-await-in syntax.
The following iOS example iterates over an asynchronous sequence of orientation notifications. It uses the Async method filter(_:) to only receive notifications when the device rotates into the upright portrait orientation.
UIDevice.current.beginGeneratingDeviceOrientationNotifications()
for await notification in NotificationCenter.default.notifications(
named: UIDevice.orientationDidChangeNotification)
.filter({ _ in
return UIDevice.current.orientation == .portrait
})
{
print("Device is now in portrait orientation.")
}