iOS 本地通知队列如何为 UNTimeIntervalNotificationTrigger 工作？

Question

如果我创建一个简单的应用程序，我希望在连续 4 分钟内每分钟发送一个通知；在最初的 5 秒延迟之后。

当我调用下面的 scheduleManyNotes() 时，我打印出待处理的通知并且只看到 1 个。是什么原因导致这些通知被组合到 1 个中？

func scheduleManyNotes() {

    for x in 0...4 {
        scheduleNote("note \(x)", (x * 60) + 5)
    }

    notificationCenter.getPendingNotificationRequests(completionHandler:{reqs in
        for request in reqs {
            print(request)
        }
    })
}

func scheduleNote(_ msg: String, _ delaySec: Int) {
    let content = UNMutableNotificationContent()
    content.sound = UNNotificationSound.default
    content.body = msg
    content.badge = NSNumber(integerLiteral: delaySec)
    content.categoryIdentifier = msg
    let trigger = delaySec == 0 ? nil : UNTimeIntervalNotificationTrigger(timeInterval: Double(delaySec), repeats: false)
    let request = UNNotificationRequest(identifier: "identifier", content: content, trigger: trigger)

    NSLog("Scheduling Request \(msg)")

    notificationCenter.add(request) { (error) in
        if let error = error {
            NSLog("Error \(error.localizedDescription)")
        }
    }
}

Answer 1

问题是我对所有 TimeInterval 通知使用了相同的标识符。一个我将标识符更改为对每个请求都是唯一的，然后我有 5 个唯一请求。

// Original

    let request = UNNotificationRequest(identifier: "identifier", content: content, trigger: trigger)


// Modfified

    let uid = UUID.init().uuidString
    print("hopefully unique uuid:\(uid)")
    let request = UNNotificationRequest(identifier: uid, content: content, trigger: trigger)

iOS 本地通知队列如何为 UNTimeIntervalNotificationTrigger 工作？

How does iOS Local Notification Queueing work for UNTimeIntervalNotificationTrigger?

iphone

ios

uilocalnotification

swift

ios13