ios - 重复本地通知会删除之前待处理的本地通知

Question

我想每 30 分钟后发送一次本地通知。我已经实现了重复本地通知，但它删除了前面的本地通知。场景解释如下:我的客户想要获得夜间警报。他希望早上醒来时可以立即查看所有通知提醒。

这是代码:

func application(_ application: UIApplication,  didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler: {didAllow,error in  })
    return true
}
func applicationDidEnterBackground(_ application: UIApplication) {
    let content = UNMutableNotificationContent()
    content.title = "Hello"
    content.subtitle = "I am your local notification"
    content.body = "Yippppiiiieee...."
    content.badge = 1
    let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)
    let request = UNNotificationRequest(identifier: "testing", content: content, trigger: trigger)
    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

}

Answer 1

首先，您不应使用相同的标识符，因为它会删除已安排的标识符

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

其次你必须插入不同的TimeInterval

let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)

//

(1...10).forEach {

    let content = UNMutableNotificationContent()
    content.title = "Hello \($0)"
    content.subtitle = "I am your local notification \($0)"
    content.body = "Yippppiiiieee.... \($0)"
    content.badge = 1
    let trigger = UNTimeIntervalNotificationTrigger(timeInterval:TimeInterval($0*1800), repeats: false)
    let request = UNNotificationRequest(identifier: "testing\($0)", content: content, trigger: trigger)
    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

}