ios - UNNotificationRequest 需要唯一标识符，但也会触发重复项

Question

我这样调用本地通知

let center = UNUserNotificationCenter.current()
let content = UNMutableNotificationContent()
content.title = title
content.body = text
content.categoryIdentifier = category
content.userInfo = map
content.sound = UNNotificationSound.default()
content.setValue("YES", forKeyPath: "shouldAlwaysAlertWhileAppIsForeground")
let request = UNNotificationRequest(identifier: "testing", content: content, trigger: nil)
center.add(request)

每次都使用相同的 UNNotificationRequest 标识符(不变的字符串)。根据the docs :

identifier

A unique identifier for the request (if identifier is not unique, a new notification request object is not created). You can use this identifier later to cancel a request that is still pending. This parameter must not be nil.

本地通知在我每次触发时都会触发，即使是在应用程序的同一个实例中。标识符始终相同。文档有错吗？

Answer 1

此时文档已更正且更准确: https://developer.apple.com/documentation/usernotifications/unnotificationrequest/1649633-init

The system uses the identifier parameter to determine how to handlethe request:

• If you provide a unique identifier, the system creates a new notification.
• If the identifier matches a previously delivered notification, the system alerts the user again, replaces the old notification with thenew one, and places the new notification at the top of the list.
• If the identifier matches a pending request, the new request replaces the pending request.