I want to schedule local notification for X minutes and take user to a specified link when actioned.
currently when the app is in foreground or inactive the delegate method UNUserNotificationCenter(didReceive: withCompletionHandler:) is called and the app works as expected (the deep link opens)
the issue I'm running into is when the notification is received when the app is suspended or background and the notification launches the application I cannot seem to capture where the link is received and cannot follow the link, from what I can see that delegate method is not called?
below is the implementation for UNUserNotificationCenter(didReceive: withCompletionHandler:)
defer {
completionHandler()
}
guard
response.actionIdentifier == UNNotificationDefaultActionIdentifier ||
response.actionIdentifier == "open-dl" else {
return
}
guard
let url = response.notification.request.content.userInfo["link-to"] as? String,
let linkTo = URL(string: url) else {
return
}
if UIApplication.shared.applicationState == .background {
UserDefaults.standard.set(linkTo, forKey: "localdeeplink")
UserDefaults.standard.synchronize()
} else {
_ = UIApplication.shared.delegate?.application?(UIApplication.shared, open: linkTo, options: [:])
}
When I attempt to read that localdeeplink entry back out of UserDefaults it's empty.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
//add this function
if launchOptions != nil {
pushAction(launchOptions: launchOptions)
}
return true
}
func pushAction(launchOptions: [NSObject: AnyObject]?) {
//add code of UNUserNotificationCenter(didReceive: withCompletionHandler:) here
}
Add the code of UNUserNotificationCenter(didReceive: withCompletionHandler:) in pushAction function
When app is closed didRecive is not getting called, didFinish is called with the push payload.
Apple link go to Handling Remote Notifications at bottom
Related
I am getting this error when I am trying to register with Google in my IOS app. I have got the REVERSED-CLIEND_ID which looks like something like this: com.googleusercontent.apps..... So far I can open the google window and I get the 400 error.
AppDelegate:
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
ApplicationDelegate.shared.application(application,didFinishLaunchingWithOptions: launchOptions)
GIDSignIn.sharedInstance.restorePreviousSignIn { user, error in
if error != nil || user == nil {
// Show the app's signed-out state.
} else {
// Show the app's signed-in state.
}
}
return true
}
func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
ApplicationDelegate.shared.application(
app,
open: url,
sourceApplication: options[UIApplication.OpenURLOptionsKey.sourceApplication] as? String,
annotation: options[UIApplication.OpenURLOptionsKey.annotation]
)
var handled: Bool
handled = GIDSignIn.sharedInstance.handle(url)
if handled {
return true
}
// Handle other custom URL types.
// If not handled by this app, return false.
return false
}
}
ViewController:
let signInConfig = GIDConfiguration.init(clientID: "REVERSED_URL_THING")
#IBAction func googleRegister(_ sender: UIButton) {
GIDSignIn.sharedInstance.signIn(
with: signInConfig,
presenting: self
) { user, error in
guard error == nil else { return }
guard let user = user else { return }
// Your user is signed in!
}
}
If anyone came across the same issue, in Xcode's URL Types add iOS URL scheme and do not use reversed url like it was said in many tutorials. Use the CLIEND ID which Google provides:
let signInConfig = GIDConfiguration.init(clientID: "CLIENT ID ")
I have an app with push notifications and RealmDB. User himself chooses the date of notifications after that the notification date goes to the RealmDB. Every time a user receives a notification, the date of the next notification changes, and the user can see the date in Table View. Problem is...after the user has received the notification, he goes to the application through the push notification so func doesn't work. If user go to app by open it - everything is OK.
In cellForRowAt:
center.getDeliveredNotifications { (notifications) in
for notification:UNNotification in notifications {
print(notification.request.identifier)
if (notification.request.identifier == timeId){
let today = notification.date
let realNextDate = Calendar.current.date(byAdding: .day, value: timeInterval!, to: today)
let realm = try! Realm()
try! realm.write {
for plants in realm.objects(MyPlant.self).filter("id == %#", timeId as Any) {
plants.nextDate = realNextDate
plants.prevDate = today
}
}
}
}
}
The reason behind this I believe is that you are configuring Realm in the AppDelegate with
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
return true
}
This is what is executed when you open the app by tapping on the App icon. In the case where you open the app by tapping the push notification, the above AppDelegate method isn't executed. Instead a method shown below is executed,
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
// unused
}
Due to this, you will have to do some configurations in this method as well for it to work when tapped on the notification.
I build chat app. I have field in each user table which allow to check if user Online. I use just database reference to get isOnline status and update it when pull to refresh. I seen that apps update online status automatically when user open or fold app. How i can do that? Do i need any listener or any framework can help me upgrade my code)) Something like ReactiveCocoa/ReactiveSwift...
P.S sorry for cyrillic text on field isOnline) it means Online/Offline
When application start you can update user online in AppDelegate
Update user online
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
FirebaseApp.configure()
// status parameter indicate user Online
if Auth.auth().currentUser != nil {
OnlineOfflineService.online(for: (Auth.auth().currentUser?.uid)!, status: true){ (success) in
print("User ==>", success)
}
}
return true
}
Update user Offline
func applicationWillTerminate(_ application: UIApplication) {
if Auth.auth().currentUser != nil {
OnlineOfflineService.online(for: (Auth.auth().currentUser?.uid)!, status: false){ (success) in
print("User ==>", success)
}
}
}
Firebase online and offline update service
import UIKit
import FirebaseDatabase
struct OnlineOfflineService {
static func online(for uid: String, status: Bool, success: #escaping (Bool) -> Void) {
//True == Online, False == Offline
let onlinesRef = Database.database().reference().child(uid).child("isOnline")
onlinesRef.setValue(status) {(error, _ ) in
if let error = error {
assertionFailure(error.localizedDescription)
success(false)
}
success(true)
}
}
}
Also you need to take care about user network connection. If user network connection off you just call OnlineOfflineService with parameters
I know this is an older question, but if you want to set the online/offline value to false when user closes app, use .onDisconnectSetValue():
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
FirebaseApp.configure()
setInactivityObservers()
return true
}
func setInactivityObservers() {
guard let user = Auth.auth().currentUser else { return }
// get user branch of database
let ref = Database.database().reference()
let usersRef = ref.child("Users")
let userRef = usersRef.child(user.uid)
// set "isOnline" branch to true when app launches
userRef.child("isOnline").setValue(true)
// set value to false when user terminates app
userRef.child("isOnline").onDisconnectSetValue(false)
}
First
Database.database().isPersistenceEnabled = true
Then manage the "presence"
let presenceRef = Database.database().reference(withPath: "disconnectmessage");
// Write a string when this client loses connection
presenceRef.onDisconnectSetValue("I disconnected!")
Then when the user is disconnected
presenceRef.onDisconnectRemoveValue { error, reference in
if let error = error {
print("Could not establish onDisconnect event: \(error)")
}
}
And Finally, to detect the status
let connectedRef = Database.database().reference(withPath: ".info/connected")
connectedRef.observe(.value, with: { snapshot in
if snapshot.value as? Bool ?? false {
print("Connected")
} else {
print("Not connected")
}
})
Is it ok now ?
In my application I'm using Firebase Messaging and I'm testing to receive notification.
I'm using Postman as Rest service to configure the notification's body like:
{
"to": "/topics/test",
"priority": "high",
"notification": {
"title": "Test",
"body": "New",
"badge": "0"
},
"data": {
"foo": "bar"
}
}
Certificate is ok. I don't understand how to start programmatically a ViewController looking at the data passed..For example if data contains:
"data": {
"foo": "viewcontroller1"
}
I'd like to start ViewController1 when user clicks on the notification.
I can only print data in AppDelegate? How can I use values passed?
This is my AppDelegate.swift:
import UIKit
import Firebase
import FirebaseMessaging
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
FIRApp.configure()
let notificationTypes : UIUserNotificationType = [UIUserNotificationType.Alert, UIUserNotificationType.Badge, UIUserNotificationType.Sound]
let notificationSettings = UIUserNotificationSettings(forTypes: notificationTypes, categories: nil)
application.registerForRemoteNotifications()
application.registerUserNotificationSettings(notificationSettings)
return true
}
// [START refresh_token]
func tokenRefreshNotification(notification: NSNotification) {
let refreshedToken = FIRInstanceID.instanceID().token()!
print("InstanceID token: \(refreshedToken)")
// Connect to FCM since connection may have failed when attempted before having a token.
connectToFcm()
}
// [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.")
}
}
}
//Receive and handle messages
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
// Print message ID.
print("Value for foo -> \(userInfo["foo"])")
//start viewcontroller programmatically
}
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.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
Can someone please explain me please?
Lets handle the code in didReceiveRemoteNotification First we extract which view controller should we present:
let type = userInfo["foo"] as! String
if type == "viewcontroller1" {
// here we go to start the view controller
}
You will need to use helping method to find the top most view controller to present on top of it.
func getTopViewController()->UIViewController{
if var topController = UIApplication.sharedApplication().keyWindow?.rootViewController {
while let presentedViewController = topController.presentedViewController {
topController = presentedViewController
}
return topController
// topController should now be your topmost view controller
}
return UIViewController()
}
To start a ViewController you should make an identifier for that in Storyboard. lets say its also called : viewcontroller1 then :
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("viewcontroller1") as! viewcontroller1
self.getTopViewController().presentViewController(vc, animated: true, completion: nil)
Note: When receiving the notification you'll need to check if the app was in background or it was in app or it was outside the app . For each one has different handling of how and when you'll need to show or present your view controller.
I'm trying to make my app download images in background. But when I press [Home] button, the app stop download. Is there any way to make it continue download even when I use another app? I have seen some apps can do like that but I don't know how.
This is what I've tried so far.
//
// AppDelegate.swift
// Swift-TableView-Example
//
// Created by Bilal ARSLAN on 11/10/14.
// Copyright (c) 2014 Bilal ARSLAN. All rights reserved.
//
import UIKit
import WebKit
protocol DownloadInBackgroundDelegate {
func downloadInBackgroundDidFinish(chapterid:Int, chaptername:String, storyid:Int, progressPercent:Float)
}
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var shareCache = NSURLCache()
var downloadDelegate:DownloadInBackgroundDelegate? = nil
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
var navigationBarAppearace = UINavigationBar.appearance()
application.setStatusBarOrientation(UIInterfaceOrientation.PortraitUpsideDown, animated: false)
self.startDownload()
return true
}
func application(application: UIApplication,
didReceiveRemoteNotification userInfo: [NSObject : AnyObject],
fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
}
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.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
FBAppEvents.activateApp()
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
}
func application(application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
}
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
}
func applicationDidReceiveMemoryWarning(application: UIApplication) {
NSURLCache.sharedURLCache().removeAllCachedResponses()
}
func application(application: UIApplication, willChangeStatusBarOrientation newStatusBarOrientation: UIInterfaceOrientation, duration: NSTimeInterval) {
application.windows
}
func startDownload(){
var filesPath = [String]()
filesPath.append("https://developer.apple.com/library/ios/documentation/iphone/conceptual/iphoneosprogrammingguide/iphoneappprogrammingguide.pdf")
filesPath.append("https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/MobileHIG/MobileHIG.pdf")
filesPath.append("https://developer.apple.com/library/ios/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/NetworkingOverview.pdf")
filesPath.append("https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/AVFoundationPG/AVFoundationPG.pdf")
filesPath.append("http://manuals.info.apple.com/MANUALS/1000/MA1565/en_US/iphone_user_guide.pdf")
downloadFiles(0, filesPath: filesPath)
}
func downloadFiles(index: Int, filesPath: [String]) -> Void {
var imgURL: NSURL = NSURL(string: filesPath[index].stringByTrimmingCharactersInSet(.whitespaceAndNewlineCharacterSet()).stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)!)!
let request: NSURLRequest = NSURLRequest(URL: imgURL)
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue(), completionHandler: {(response: NSURLResponse!,data: NSData!,error: NSError!) -> Void in
var fileCacheName = String(format: "%04d", index)
dispatch_async(dispatch_get_main_queue(), {
var fileExt = (data != nil && error == nil) ? Utility.checkImageType(data) : ""
let paths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as! String
let imagePath = paths.stringByAppendingPathComponent("\(fileCacheName).png")
if data.writeToFile(imagePath, atomically: false)
{
println("saved")
}
if index < filesPath.count - 1
{
var nextIndex:Int = index + 1
self.downloadFiles(nextIndex, filesPath: filesPath)
}
})
})
}
}
Answer
Based on the comment below, I found this thread : objective c - Proper use of beginBackgroundTaskWithExpirationHandler . I can solve my problem with it.
For downloading and storing of the images, instead of writing the logic yourself, I suggest you use some well known libraries, like:
https://github.com/Haneke/Haneke
https://github.com/rs/SDWebImage
Reason behind that is those libraries are well tested, quite robust and mainly very easy to use for basic tasks.
Now for the background download, there is beginBackgroundTaskWithExpirationHandler: that is specifically designed to do that. When you use it, you will get few more minutes to execute whatever you need (after that limit, your application will get terminated no matter what).
You can write following methods:
func beginBackgroundTask() -> UIBackgroundTaskIdentifier {
return UIApplication.sharedApplication().beginBackgroundTaskWithExpirationHandler({})
}
func endBackgroundTask(taskID: UIBackgroundTaskIdentifier) {
UIApplication.sharedApplication().endBackgroundTask(taskID)
}
When you want to use it, you just simple begin / end the task when starting / finishing the download call:
// Start task
let task = self.beginBackgroundTask()
// Do whatever you need
self.someBackgroundTask()
// End task
self.endBackgroundTask(task)
Hope it helps!
Use beginBackgroundTaskWithExpirationHandler: from the UIApplication to start a background task when the app enters the background
See Apple's document on multitasking background execution for details. See download in background in iphone its a similar question.