我正在Swift中开发一个必须使用FCM作为通知服务的应用程序。在我的应用程序中,FCM仅在位于前台而不在后台时才起作用。
我已经尝试了几种方法,例如:
priority
设置为high
data
更改为notification
我也有一个错误:
Failed to fetch APNS token Error Domain=com.firebase.iid Code=1001 "(null)"
但是该通知可以在前台正常工作而不会出现任何问题。以下是我的AppDelegate:
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
FIRApp.configure()
// Add observer for InstanceID token refresh callback.
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(self.tokenRefreshNotification),
name: kFIRInstanceIDTokenRefreshNotification, object: nil)
return true
}
func registerForPushNotifications(application: UIApplication) {
let notificationSettings = UIUserNotificationSettings(
forTypes: [.Badge, .Sound, .Alert], categories: nil)
application.registerUserNotificationSettings(notificationSettings)
}
func application(application: UIApplication, didRegisterUserNotificationSettings notificationSettings: UIUserNotificationSettings) {
if notificationSettings.types != .None {
application.registerForRemoteNotifications()
}
}
func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
let tokenChars = UnsafePointer<CChar>(deviceToken.bytes)
var tokenString = ""
for i in 0..<deviceToken.length {
tokenString += String(format: "%02.2hhx", arguments: [tokenChars[i]])
}
//Tricky line
FIRInstanceID.instanceID().setAPNSToken(deviceToken, type: FIRInstanceIDAPNSTokenType.Unknown)
print("Device Token:", tokenString)
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
// [START receive_message]
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject],
fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
// If you are receiving a notification message while your app is in the background,
// this callback will not be fired till the user taps on the notification launching the application.
// TODO: Handle data of notification
let alertController = UIAlertController(title: "Notification", message: "A standard alert", preferredStyle: .Alert)
let OKAction = UIAlertAction(title: "OK", style: .Default) { (action:UIAlertAction!) in
}
alertController.addAction(OKAction)
self.window?.rootViewController?.presentViewController(alertController, animated: true, completion:nil)
// Print message ID.
// print("Message ID: \(userInfo["gcm.message_id"]!)")
// Print full message.
print("%@", userInfo)
}
// [END receive_message]
// [START refresh_token]
func tokenRefreshNotification(notification: NSNotification) {
if let refreshedToken = FIRInstanceID.instanceID().token() {
print("InstanceID token: \(refreshedToken)")
}
// Connect to FCM since connection may have failed when attempted before having a token.
connectToFcm()
}
// [END refresh_token]
// [START connect_to_fcm]
func connectToFcm() {
FIRMessaging.messaging().connectWithCompletion { (error) in
if (error != nil) {
print("Unable to connect with FCM. \(error)")
} else {
print("Connected to FCM.")
}
}
}
// [END connect_to_fcm]
func applicationDidBecomeActive(application: UIApplication) {
connectToFcm()
}
// [START disconnect_from_fcm]
func applicationDidEnterBackground(application: UIApplication) {
FIRMessaging.messaging().disconnect()
print("Disconnected from FCM.")
}
// [END disconnect_from_fcm]
在我的服务器中,我使用类似以下的方法来推送通知:
method: 'POST',
uri: 'https://fcm.googleapis.com/fcm/send',
headers: {
'Content-Type': 'application/json',
'Authorization':'key= **THE KEY**'
},
body: JSON.stringify({
"to" : " **USER INSTANCEID TOKEN** ",
"priority":"high",
"data" : {
"title": "FCM TITLE",
"body" : "FROM FCM",
"badge": "0",
"sound": "default"
}
})
我尝试在任何地方搜索,但是找不到任何解决方案,并且似乎在FCM文档中找不到与此问题有关的任何信息。
最佳答案
我在iOS \ Swift中很新...但是我想也许是这样的代码:
// [START disconnect_from_fcm]
func applicationDidEnterBackground(application: UIApplication) {
FIRMessaging.messaging().disconnect()
print("Disconnected from FCM.")
}
// [END disconnect_from_fcm]
每当应用程序进入后台时,您就会从Firebase云消息中注销。这就是为什么您没有收到通知的原因。
您可以尝试注释掉此方法,看看是否可行吗?
LMK,谢谢。