iOS。向离线设备发送推送
iOS. Send push to devices which are offline
我想向应用程序用户发送推送通知。在线的用户会立即收到它，对吗？但是离线的用户呢？他们上线后会收到通知吗？
你能告诉我更多关于推送通知的信息吗？
Messenger 是否使用推送来发送有关新消息的通知？
无法离线使用。
Apple Push Notification Service includes a default Quality of Service (QoS) component that performs a store-and-forward function. If APNs attempts to deliver a notification but the device is offline, the QoS stores the notification. It retains only one notification per application on a device: the last notification received from a provider for that application. When the offline device later reconnects, the QoS forwards the stored notification to the device. The QoS retains a notification for a limited period before deleting it.
If a device remains offline for a long time, all notifications that were being stored for it are discarded; when the device goes back online, none of the notifications are displayed.
基本上，当设备再次联机时（在合理的时间范围内），Apple 会尝试发送通知。
Apple Push Notification service includes a default Quality of Service (QoS) component that performs a store-and-forward function. If APNs attempts to deliver a notification but the destination device is offline, APNs stores the notification for a limited period of time and delivers it to the device when the device becomes available.
我想向应用程序用户发送推送通知。在线的用户会立即收到它，对吗？但是离线的用户呢？他们上线后会收到通知吗？
你能告诉我更多关于推送通知的信息吗？
Messenger 是否使用推送来发送有关新消息的通知？
无法离线使用。
Apple Push Notification Service includes a default Quality of Service (QoS) component that performs a store-and-forward function. If APNs attempts to deliver a notification but the device is offline, the QoS stores the notification. It retains only one notification per application on a device: the last notification received from a provider for that application. When the offline device later reconnects, the QoS forwards the stored notification to the device. The QoS retains a notification for a limited period before deleting it.
If a device remains offline for a long time, all notifications that were being stored for it are discarded; when the device goes back online, none of the notifications are displayed.
基本上，当设备再次联机时（在合理的时间范围内），Apple 会尝试发送通知。
Apple Push Notification service includes a default Quality of Service (QoS) component that performs a store-and-forward function. If APNs attempts to deliver a notification but the destination device is offline, APNs stores the notification for a limited period of time and delivers it to the device when the device becomes available.