iOS12新特性之推送通知详解

let content = UNMutableNotificationContent() 
content.title = "Notifications Team" 
content.body = "WWDC session after party" 
content.threadIdentifier = "notifications-team-chat"//通过这个属性设置分组，如果此属性没有设置则以APP为分组依据

let summaryFormat = "%u 更多消息啦啦"
return UNNotificationCategory(identifier: "category-identifier",
actions: [],
intentIdentifiers: [],
hiddenPreviewsBodyPlaceholder: nil,
categorySummaryFormat: summaryFormat,
options: [])

let content = UNMutableNotificationContent() 
content.body = "..." 
content.summaryArgument = "OceanFish"

let content = UNMutableNotificationContent() 
content.body = "..." 
content.threadIdentifier = "..." 
content.summaryArgument = "Song by Song" 
content.summaryArgumentCount = 3

import UserNotificationsUI
class NotificationViewController: UIViewController, UNNotificationContentExtension {

 @IBOutlet var likeButton: UIButton?

 likeButton?.addTarget(self, action: #selector(likeButtonTapped), for: .touchUpInside)

 @objc func likeButtonTapped() {
  likeButton?.setTitle("♥", for: .normal)
  likedPhoto()
 }
}

// Notification Content Extensions
class NotificationViewController: UIViewController, UNNotificationContentExtension {

 func didReceive(_ response: UNNotificationResponse, completionHandler completion:
  (UNNotificationContentExtensionResponseOption) -> Void) {
  if response.actionIdentifier == "like-action" {
   // Update state...
   let unlikeAction = UNNotificationAction(identifier: "unlike-action",
             title: "Unlike", options: [])
   let currentActions = extensionContext?.notificationActions
   let commentAction = currentActions![1]
   let newActions = [ unlikeAction, commentAction ]
   extensionContext?.notificationActions = newActions
  }
 }
}

import UIKit
import UserNotifications
class AppDelegate: UIApplicationDelegate, UNUserNotificationCenterDelegate {
 func userNotificationCenter(_ center: UNUserNotificationCenter,
        openSettingsFor notification: UNNotification? ) {
 }
}

let notificationCenter = UNUserNotificationCenter.current()
noficationCenter.requestAuthorization(options: [.badge,.alert,.sound,.provisional]) { (tag, error) in
}

let notificationCenter = UNUserNotificationCenter.current()
noficationCenter.requestAuthorization(options: [.badge,.alert,.sound,.criticalAlert]) { (tag, error) in
}

let content = UNMutableNotificationContent()
content.title = "WARNING: LOW BLOOD SUGAR"
content.body = "Glucose level at 57."
content.categoryIdentifier = "low-glucose—alert"
content.sound = UNNotificationSound.criticalSoundNamed(@"warning-sound" withAudioVolume: 1.00)

// Critical alert push payload
{
 // Critical alert push payload
 {
  "aps" : {
   "sound" : {
    "critical": 1,
   }
  }
  "name": "warning-sound.aiff",
  "volume": 1.0
 }
}