如何在iOS上使用FCM在后台获取推送通知(Swift4) [英] How to get push notification with FCM in background on iOS (Swift4)
本文介绍了如何在iOS上使用FCM在后台获取推送通知(Swift4)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何在后台获取推送通知?我在Swift4 iOS 11中遇到一个问题，即只有在打开应用程序的情况下，FCM的推送通知才能在后台检索通知.
How to get push notification in background? I have a problem in Swift4 iOS 11 with push notifications with FCM unable to retrieve notifications in the background only when the application is opened.
这是我的编码:
AppDelegate.swift
AppDelegate.swift
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {
var window: UIWindow?
static var DEVICE_ID = String()
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
UIApplication.shared.statusBarStyle = .lightContent
FirebaseApp.configure()
if #available(iOS 10.0, *) {
// For iOS 10 display notification (sent via APNS)
UNUserNotificationCenter.current().delegate = self
UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler: { (success, error) in
print(success)
})
Messaging.messaging().delegate = self
} else {
let settings: UIUserNotificationSettings =
UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
return true
}
func connectToFcm() {
Messaging.messaging().shouldEstablishDirectChannel = true
if let token = InstanceID.instanceID().token() {
AppDelegate.DEVICE_ID = token
print("*********")
print("Token Instance: \(token)")
print("*********")
}
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .sound])
}
func messaging(_ messaging: Messaging, didRefreshRegistrationToken fcmToken: String) {
connectToFcm()
}
func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
guard let data: [String: Any] = remoteMessage.appData as? [String: Any] else {
return
}
print(data)
}
func applicationDidBecomeActive(_ application: UIApplication) {
UIApplication.shared.applicationIconBadgeNumber = 0
connectToFcm()
}
func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
completionHandler(.newData)
}
}
推荐答案
AppDelegate.swift中的此源代码:
this source code in AppDelegate.swift:
import UIKit
import UserNotifications
import FirebaseCore
import FirebaseMessaging
import FirebaseInstanceID
struct DataNotif: Codable {
var title: String?
var body: String?
private enum CodingKeys: String, CodingKey {
case title
case body
}
}
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {
var window: UIWindow?
let gcmMessageIDKey = "message_id"
static var DEVICE_ID = String()
var msg_body = ""
var msg_title = ""
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
UIApplication.shared.statusBarStyle = .lightContent
FirebaseApp.configure()
Messaging.messaging().delegate = self
if #available(iOS 10.0, *) {
// For iOS 10 display notification (sent via APNS)
UNUserNotificationCenter.current().delegate = self
let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(
options: authOptions,
completionHandler: {_, _ in })
} else {
let settings: UIUserNotificationSettings =
UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
return true
}
func connectToFcm() {
Messaging.messaging().shouldEstablishDirectChannel = true
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
if let refreshedToken = InstanceID.instanceID().token() {
AppDelegate.DEVICE_ID = refreshedToken
print("*********")
print("InstanceID token: \(refreshedToken)")
print("*********")
}else{
print("Can't get token device")
}
connectToFcm()
}
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
print("Failed to register for remote notifications with error: \(error)")
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
print(userInfo)
guard let data: [String: Any] = userInfo as? [String: Any] else {
return
}
let listData = data["notification"] as! String
let jsonData = listData.data(using: .utf8)
do {
let decoder = JSONDecoder()
let dataJson = try decoder.decode(DataNotif.self, from: jsonData!)
msg_body = dataJson.body!
msg_title = dataJson.title!
createNotification(title: msg_title, body: msg_body)
}catch{
print("error")
}
completionHandler(.newData)
}
// messaging
func messaging(_ messaging: Messaging, didRefreshRegistrationToken fcmToken: String) {
if let token = InstanceID.instanceID().token() {
AppDelegate.DEVICE_ID = token
print("*********")
print("Token Instance: \(token)")
print("*********")
}
connectToFcm()
}
func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
print("Received data message: \(remoteMessage.appData)")
guard let data: [String: Any] = remoteMessage.appData as? [String: Any] else {
return
}
print(data)
let listData = data["notification"] as! String
let jsonData = listData.data(using: .utf8)
do {
let decoder = JSONDecoder()
let dataJson = try decoder.decode(DataNotif.self, from: jsonData!)
msg_body = dataJson.body!
msg_title = dataJson.title!
createNotification(title: msg_title, body: msg_body)
}catch{
print("error")
}
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .badge, .sound])
}
func applicationDidBecomeActive(_ application: UIApplication) {
UIApplication.shared.applicationIconBadgeNumber = 0
connectToFcm()
}
func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
if let vc = window?.rootViewController as? HomeController {
vc.scheduleNotification()
}
completionHandler(.newData)
}
func applicationDidEnterBackground(_ application: UIApplication) {
Messaging.messaging().shouldEstablishDirectChannel = false
print("Disconnect FCM")
}
func createNotification(title: String, body: String) {
let content = UNMutableNotificationContent()
content.title = NSString.localizedUserNotificationString(forKey: title, arguments: nil)
content.body = NSString.localizedUserNotificationString(forKey: body, arguments: nil)
content.sound = UNNotificationSound.default()
content.badge = NSNumber(integerLiteral: UIApplication.shared.applicationIconBadgeNumber + 1)
let request = UNNotificationRequest.init(identifier: "pushNotif", content: content, trigger: nil)
let center = UNUserNotificationCenter.current()
center.add(request)
}
}
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