Detect if the app was launched opened from a push notification

Question

Is it possible to know if the app was launched opened from a push notification   I guess the launching event can be caught here   -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions        if  launchOptions    nil                Launched from push notification          NSDictionary  notification    launchOptions objectForKey UIApplicationLaunchOptionsRemoteNotificationKey              However  how can I detect it was opened from a push notification when the app was in background

User · Answer

This is a well worn post    but it is still missing an actual solution to the problem  as is pointed out in the various comments       The original question is about detecting when the app was launched     opened from a push notification  e g  a user taps on the   notification  None of the answers actually cover this case    The reason can be seen in the call flow when a notification arrives  application didReceiveRemoteNotification     gets called when the notification is received AND again when the notification is tapped by the user   Because of this  you can t tell by just looking at UIApplicationState wether the user tapped it   Additionally  you no longer need to handle the situation of a  cold start  of the app in application didFinishLaunchingWithOptions    as application didReceiveRemoteNotification    is called again after launching in iOS 9   maybe 8 as well    So  how can you tell if the user tap started the chain of events   My solution is to mark the time at which the app begins to come out of the background or cold start and then check that time in application didReceiveRemoteNotification      If it is less than 0 1s  then you can be pretty sure the tap triggered the startup   Swift 2 x  class AppDelegate  UIResponder  UIApplicationDelegate      var wakeTime   NSDate   NSDate             when did our application wake up most recently     func applicationWillEnterForeground application  UIApplication               time stamp the entering of foreground so we can tell how we got here     wakeTime   NSDate          func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject   AnyObject   fetchCompletionHandler completionHandler   UIBackgroundFetchResult  - gt  Void           ensure the userInfo dictionary has the data you expect     if let type   userInfo  type   as  String where type     status             IF the wakeTime is less than 1 10 of a second  then we got here by tapping a notification       if application applicationState    UIApplicationState Background  amp  amp  NSDate   timeIntervalSinceDate wakeTime   lt  0 1              User Tap on notification Started the App               else              DO stuff here if you ONLY want it to happen when the push arrives               completionHandler  NewData            else         completionHandler  NoData                Swift 3  class AppDelegate  UIResponder  UIApplicationDelegate        var wakeTime   Date   Date             when did our application wake up most recently       func applicationWillEnterForeground   application  UIApplication             time stamp the entering of foreground so we can tell how we got here       wakeTime   Date            func application   application  UIApplication  didReceiveRemoteNotification userInfo   AnyHashable   Any   fetchCompletionHandler completionHandler   escaping  UIBackgroundFetchResult  - gt  Void              ensure the userInfo dictionary has the data you expect       if let type   userInfo  type   as  String  type     status               IF the wakeTime is less than 1 10 of a second  then we got here by tapping a notification         if application applicationState    UIApplicationState background  amp  amp  Date   timeIntervalSince wakeTime   lt  0 1                User Tap on notification Started the App                   else                DO stuff here if you ONLY want it to happen when the push arrives                   completionHandler  newData                else           completionHandler  noData                    I have tested this for both cases  app in background  app not running  on iOS 9  and it works like a charm   0 1s is pretty conservative too  the actual value is  0 002s so 0 01 is fine as well

User · Answer

The problem with this question is that  opening  the app isn t well-defined   An app is either cold-launched from a not-running state  or it s reactivated from an inactive state  e g  from switching back to it from another app    Here s my solution to distinguish all of these possible states   typedef NS ENUM NSInteger  MXAppState        MXAppStateActive   0      MXAppStateReactivated   1      MXAppStateLaunched   2     -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions              your custom launch stuff       MXDefaults instance  setDateOfLastLaunch  NSDate date               more custom launch stuff    -  void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo fetchCompletionHandler  void     UIBackgroundFetchResult  completionHandler          Through a lot of trial and error  by showing alerts   I can confirm that on iOS 10        this method is only called when the app has been launched from a push notification        or when the app is already in the Active state   When you receive a push        and then launch the app from the icon or apps view  this method is  not  called         So with 99  confidence  it means this method is called in one of the 3 mutually exclusive cases           1  we are active in the foreground  no action was taken by the user           2  we were  launched  from an inactive state  so we may already be in the main section  by a tap              on a push notification           3  we were truly launched from a not running state by a tap on a push notification        Beware that cases  2  and  3  may both show UIApplicationStateInactive and cant be easily distinguished         We check the last launch date to distinguish  2  and  3        MXAppState appState    self mxAppStateFromApplicationState  application applicationState              your app s logic    -  MXAppState mxAppStateFromApplicationState  UIApplicationState state       if  state    UIApplicationStateActive            return MXAppStateActive        else           NSDate  lastLaunchDate     MXDefaults instance  dateOfLastLaunch           if  lastLaunchDate  amp  amp    NSDate date  timeIntervalSinceDate lastLaunchDate   lt  0 5f                return MXAppStateLaunched            else               return MXAppStateReactivated                      return MXAppStateActive      And MXDefaults is just a little wrapper for NSUserDefaults

User · Answer

When app is in background as shanegao you can use  -  void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo       if   application applicationState    UIApplicationStateInactive    application applicationState    UIApplicationStateBackground                     opened from a push notification when the app was on background           But if you want to launch the application and when app is closed and you want to debug your application you can go to Edit Scheme and in left menu select Run and then in launch select Wait for executable to be launched and then you application launch when you click on push notification  Edit Scheme   Run   Wait for executable to be launched

User · Answer

For swift   func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject   AnyObject         PFPush handlePush userInfo       if application applicationState    UIApplicationState Inactive    application applicationState    UIApplicationState Background             opened from a push notification when the app was in the background

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Xcode 10 Swift 4 2  func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject   AnyObject          let state   UIApplicationState   application applicationState     if  state     Inactive    state     Background               coming from background       else              App is running in foreground

User · Answer

Straight from the documentation for   -  void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo nil   If the app is running and receives a remote notification  the app calls this method to process the notification    Your implementation of this method should use the notification to take an appropriate course of action   And a little bit later  If the app is not running when a push notification arrives  the method launches the app and provides the appropriate information in the launch options dictionary    The app does not call this method to handle that push notification    Instead  your implementation of the  application willFinishLaunchingWithOptions    or  application didFinishLaunchingWithOptions    method needs to get the push notification payload data and respond appropriately

User · Answer

I haven t tried it yet but maybe you could send yourself a notification  http   nshipster com nsnotification-and-nsnotificationcenter

User · Answer

IN SWIFT   I m running Push Notifications  with background fetching    When my app is in the background and I receive a push notification  I found that didReceiveRemoteNotification in appDelegate would be called twice  once for when notification is received and another when user clicks on the notification alert   To detect if notification alert was clicked  just check if applicationState raw value    1 inside didReceiveRemoteNotification in appDelegate    func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject  AnyObject            If not from alert click applicationState 1      if  application applicationState rawValue    1               Run your code here           I hope this helps

User · Answer

if somebody wants the answer in swift 3  func application   application  UIApplication  didReceiveRemoteNotification userInfo   AnyHashable  Any         switch application applicationState       case  active            app is currently active  can update badges count here         break     case  inactive            app is transitioning from background to foreground  user taps notification   do what you need when user taps here         break     case  background            app is in background  if content-available key of your notification is set to 1  poll to your backend to retrieve data and update your interface here         break     default          break

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shanegao s code in Swift 2 0      func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject   AnyObject                     if   application applicationState    UIApplicationState Inactive    application applicationState    UIApplicationState Background                        print  opened from a push notification when the app was on background                else                      print  opened from a push notification when the app was on foreground

User · Answer

M Othman s answer is correct for apps that don t contain scene delegate For Scene Delegate Apps This worked for me on iOS 13  Here is the code for that should be written in will connect scene  if connectionOptions notificationResponse    nil      Not opened from push notification   else       Opened from push notification     Code for app delegate to support earlier versions didFinishLaunchingWithOptions  let notification   launchOptions  UIApplication LaunchOptionsKey remoteNotification          if  notification    nil                   Launched from push notification           else                  Launch from other source

User · Answer

Yes  you can detect by this method in appDelegate    -  void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo            your Code       For local Notification   -  void application  UIApplication   application didReceiveLocalNotification  UILocalNotification   notification               your Code

User · Answer

M Othman s answer for Swift 5   Although using NSLog is not recommended anymore  Add the following after you set everything needed to display your RootViewController  In your application   didReceiveRemoteNotification   you should add the logic that can differentiate between a first launch and come to background type of launch  if let launchOptions   launchOptions   let notification   launchOptions UIApplicationLaunchOptionsKey remoteNotification   as   AnyHashable   Any        NSLog  quot app recieved notification from remote   notification  quot       self application application  didReceiveRemoteNotification  notification    else       NSLog  quot app did not recieve notification quot      Some other Swift specific answers to tackle this can be found at  How to handle launch options in Swift 3 when a notification is tapped  Getting syntax problems

User · Answer

For Swift Users    If you want to launch a different page on opening from push or something like that  you need to check it in didFinishLaunchingWithOptions like   let directVc  directVC    directVC nibName  directVC   bundle  nil  let pushVc  pushVC    pushVC nibName  pushVC   bundle  nil   if let remoteNotification   launchOptions  UIApplicationLaunchOptionsRemoteNotificationKey  as  NSDictionary        self navigationController   UINavigationController rootViewController  pushVc     else        self navigationController   UINavigationController rootViewController  directVc     self window  rootViewController   self navigationController

User · Answer

Posting this for Xamarin users   The key to detecting if the app was launched via a push notification is the AppDelegate FinishedLaunching UIApplication app  NSDictionary options  method  and the options dictionary that s passed in   The options dictionary will have this key in it if it s a local notification   UIApplication LaunchOptionsLocalNotificationKey   If it s a remote notification  it will be UIApplication LaunchOptionsRemoteNotificationKey   When the key is LaunchOptionsLocalNotificationKey  the object is of type UILocalNotification  You can then look at the notification and determine which specific notification it is   Pro-tip  UILocalNotification doesn t have an identifier in it  the same way UNNotificationRequest does    Put a dictionary key in the UserInfo containing a requestId so that when testing the UILocalNotification  you ll have a specific requestId available to base some logic on   I found that even on iOS 10  devices that when creating location notifications using the UNUserNotificationCenter s AddNotificationRequest  amp  UNMutableNotificationContent  that when the app is not running I killed it   and is launched by tapping the notification in the notification center  that the dictionary still contains the UILocalNotificaiton object   This means that my code that checks for notification based launch will work on iOS8 and iOS 10  devices  public override bool FinishedLaunching  UIApplication app  NSDictionary options         logger InfoFormat  FinishedLaunching         if options    null                if  options ContainsKey UIApplication LaunchOptionsLocalNotificationKey                           was started by tapping a local notification when app wasn t previously running                works if using UNUserNotificationCenter Current AddNotificationRequest OR UIApplication SharedApplication PresentLocalNotificationNow                var localNotification   options UIApplication LaunchOptionsLocalNotificationKey  as UILocalNotification                 I would recommended a key such as this               var requestId   localNotification UserInfo  RequestId   ToString                                       return true

User · Answer

When app is terminated  and user taps on push notification  public func application application  UIApplication  didFinishLaunchingWithOptions launchOptions   NSObject  AnyObject    - gt  Bool      if launchOptions  UIApplicationLaunchOptionsKey remoteNotification     nil         print  from push             When app is in background  and user taps on push notificaion     If the user opens your app from the system-displayed alert  the system may call this method again when your app is about to enter the foreground so that you can update your user interface and display information pertaining to the notification    public func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject   AnyObject   fetchCompletionHandler completionHandler   UIBackgroundFetchResult  - gt  Void      if application applicationState     inactive       print  from push           Depending on your app  it can also send you silent push with content-available inside aps  so be aware of this as well    See https   stackoverflow com a 33778990 1418457

User · Answer

There is only one reliable way  and it works only for iOS 10     Using UNUserNotificationCenter implement UNUserNotificationCenterDelegate method   -  void  userNotificationCenter  UNUserNotificationCenter   center didReceiveNotificationResponse  UNNotificationResponse   response withCompletionHandler  void     void  completionHandler          Here you can get your original push if you need to     NSDictionary  pusDict   response notification request content userInfo       if   response actionIdentifier isEqualToString  UNNotificationDefaultActionIdentifier               User tapped the notification       else if   response actionIdentifier isEqualToString  UNNotificationDismissActionIdentifier               User dismissed the notification        else if   response actionIdentifier isEqualToString  MYCustomActionId               User chose my custom defined action

User · Answer

In application didReceiveRemoteNotification  check whether you have received the notification when your app is in the foreground or background   If it was received in the background  launch the app from the notification   - void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo       if   UIApplication sharedApplication  applicationState    UIApplicationStateActive            NSLog   Notification received by running app          else           NSLog   App opened from Notification

User · Answer

If you are running iOS 13 or above use this code in your SceneDelegate  func scene   scene  UIScene  willConnectTo session  UISceneSession  options connectionOptions  UIScene ConnectionOptions             guard let notificationResponse   connectionOptions notificationResponse else   return            let pushTitle   notificationResponse notification request content title     let pushSubtitle   notificationResponse notification request content subtitle     let pushBody   notificationResponse notification request content body             do your staff here

User · Answer

See This code    -  void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo       if   application applicationState    UIApplicationStateInactive    application applicationState    UIApplicationStateBackground                     opened from a push notification when the app was on background           same as   - void application  UIApplication   application didReceiveLocalNotification  UILocalNotification   notification

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For swift   func application application  UIApplication  didReceiveRemoteNotification userInfo   NSObject   AnyObject           notificationNumber     application applicationIconBadgeNumber    notificationNumber       if let aps   userInfo  aps   as  NSDictionary            var message   aps  alert           println  my messages     message

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Swift 2 0 For  Not Running  State  Local  amp  Remote Notification   func application application  UIApplication  didFinishLaunchingWithOptions launchOptions   NSObject  AnyObject    - gt  Bool        Handle notification if  launchOptions    nil            For local Notification     if let localNotificationInfo   launchOptions  UIApplicationLaunchOptionsLocalNotificationKey  as  UILocalNotification            if let something   localNotificationInfo userInfo   yourKey   as  String               self window  rootViewController   UINavigationController rootViewController  YourController yourMember  something                     else         For remote Notification     if let remoteNotification   launchOptions  UIApplicationLaunchOptionsRemoteNotificationKey  as   NSObject   AnyObject              if let something   remoteNotification  yourKey   as  String               self window  rootViewController   UINavigationController rootViewController  YourController yourMember  something                        return true

User · Answer

For iOS 10   you can use this method for knowing when your notification is clicked irrespective of the state of the app   func userNotificationCenter   center  UNUserNotificationCenter  didReceive response  UNNotificationResponse  withCompletionHandler completionHandler   escaping    - gt  Void           Notification clicked     completionHandler

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late but maybe useful  When app is not running   -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions  is called     where u need to check for push notification  NSDictionary  notification    launchOptions objectForKey UIApplicationLaunchOptionsRemoteNotificationKey   if  notification        NSLog   app recieved notification from remote    notification        self application application didReceiveRemoteNotification notification     else       NSLog   app did not recieve notification

User · Answer

You can use   - void application  UIApplication   application didReceiveRemoteNotification  NSDictionary   userInfo   to handle the remote push notifications   Check here the documentation

User · Answer

The issue we had was in correctly updating the view after the app is launched   There are complicated sequences of lifecycle methods here that get confusing  Lifecycle Methods Our testing for iOS 10 revealed the following sequences of lifecycle methods for the various cases  DELEGATE METHODS CALLED WHEN OPENING APP      Opening app when system killed or user killed         didFinishLaunchingWithOptions         applicationDidBecomeActive      Opening app when backgrounded         applicationWillEnterForeground         applicationDidBecomeActive  DELEGATE METHODS CALLED WHEN OPENING PUSH      Opening push when system killed          receiving push causes didFinishLaunchingWithOptions  with options  and didReceiveRemoteNotification background          applicationWillEnterForeground         didReceiveRemoteNotification inactive         applicationDidBecomeActive      Opening push when user killed         didFinishLaunchingWithOptions  with options          didReceiveRemoteNotification inactive  only completionHandler version          applicationDidBecomeActive      Opening push when backgrounded          receiving push causes didReceiveRemoteNotification background          applicationWillEnterForeground         didReceiveRemoteNotification inactive         applicationDidBecomeActive  The problem Ok  so now we need to   Determine if the user is opening the app from a push Update the view based on the push state Clear the state so that subsequent opens don t return the user to the same position   The tricky bit is that updating the view has to happen when the application actually becomes active  which is the same lifecycle method in all cases  Sketch of our solution Here are the main components of our solution   Store a notificationUserInfo instance variable on the AppDelegate  Set notificationUserInfo   nil in both applicationWillEnterForeground and didFinishLaunchingWithOptions  Set notificationUserInfo   userInfo in didReceiveRemoteNotification inactive From applicationDidBecomeActive always call a custom method openViewFromNotification and pass self notificationUserInfo  If self notificationUserInfo is nil then return early  otherwise open the view based on the notification state found in self notificationUserInfo   Explanation When opening from a push didFinishLaunchingWithOptions or applicationWillEnterForeground is always called immediately before didReceiveRemoteNotification inactive  so we first reset notificationUserInfo in these methods so there s no stale state   Then  if didReceiveRemoteNotification inactive is called we know we re opening from a push so we set self notificationUserInfo which is then picked up by applicationDidBecomeActive to forward the user to the right view  There is one final case which is if the user has the app open within the app switcher  i e  by double tapping the home button while the app is in the foreground  and then receives a push notification   In this case only didReceiveRemoteNotification inactive is called  and neither WillEnterForeground nor didFinishLaunching gets called so you need some special state to handle that case  Hope this helps

User · Answer

I ll start with a state chart that I created for my own use to visualize it more accurately and to consider all other states   https   docs google com spreadsheets d e 2PACX-1vSdKOgo F1TZwGJBAED4C 7cml0bEATqeL3P9UKpBwASlT6ZkU3iLdZnOZoevkMzOeng7gs31IFhD-L pubhtml gid 0 amp single true  Using this chart  we can see what is actually required in order to develop a robust notification handling system that works in almost all possible use cases   Complete solution       Store notification payload in didReceiveRemoteNotification Clear stored notification in applicationWillEnterForeground and didFinishLaunchingWithOptions To tackle cases where control Center  Notification center pulled  you can use a flag willResignActiveCalled and set it to false initially   Set this to true in applicationWillResignActive method   In didReceiveRemoteNotification method  save notifications userInfo  only when willResignActiveCalled is false  Reset willResignActiveCalled to false in applicationDidEnterBackground and applicationDidBecomeActive method    Note  A Similar answer is suggested in comments on Eric s answer  however  the state sheet helps in finding all possible scenarios as I did in my app   Please find the complete code below and comment below if any specific case is not handled   AppDelegate  class AppDelegate  UIResponder  UIApplicationDelegate     private var willResignActiveCalled   false    func application   application  UIApplication  didFinishLaunchingWithOptions launchOptions   UIApplicationLaunchOptionsKey  Any    - gt  Bool       NotificationUtils shared notification   nil     return true       func applicationWillResignActive   application  UIApplication        willResignActiveCalled   true       func applicationDidEnterBackground   application  UIApplication        willResignActiveCalled   false       func applicationWillEnterForeground   application  UIApplication        NotificationUtils shared notification   nil       func applicationDidBecomeActive   application  UIApplication        willResignActiveCalled   false     NotificationUtils shared performActionOnNotification         func application   application  UIApplication  didReceiveRemoteNotification userInfo   AnyHashable   Any   fetchCompletionHandler completionHandler   escaping  UIBackgroundFetchResult  - gt  Void        if  willResignActiveCalled      Check if app is in inactive by app switcher  control center  or notification center       NotificationUtils shared handleNotification userInfo  userInfo                NotificationUtils   This is where you can write all your code to navigating to different parts of the application  handling Databases CoreData Realm  and do all other stuff that needs to be done when a notification is received      class NotificationUtils     static let shared   NotificationUtils     private init         var notification    AnyHashable  Any      func handleNotification userInfo    AnyHashable  Any        if UIApplication shared applicationState    UIApplicationState active         self notification   userInfo   Save Payload         Show inApp Alert Banner Action etc          perform immediate action on notification           else if UIApplication shared applicationState    UIApplicationState inactive        self notification   userInfo           else if UIApplication shared applicationState    UIApplicationState background          Process notification in background           Update badges  save some data received from notification payload in Databases  CoreData Realm               func performActionOnNotification           Do all the stuffs like navigating to ViewControllers  updating Badges etc     defer         notification   nil

User · Answer

func application   application  UIApplication  didReceiveRemoteNotification data   AnyHashable   Any         print  Push notification received    data         if let info   data  aps   as  Dictionary lt String  AnyObject gt            let alertMsg   info  alert   as  String         print alertMsg          switch application applicationState           case  active              print  do stuff in case App is active           case  background              print  do stuff in case App is in background                 navigateToChatDetailViewControler pushdata  data          case  inactive              print  do stuff in case App is inactive                  navigateToChatDetailViewControler pushdata  data

[ios] Detect if the app was launched/opened from a push notification

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