Open a view controller when a iOS push notification is received - ios

Question

I want to open a specific view controller when a user clicks on the received push notification message, but when I receive a push notification message and click the message, only the application opens, but it does not redirect to a specific view controller.
My code is
-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
if (applicationIsActive) {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Bildirim"
message:[NSString stringWithFormat:#"%# ",[[userInfo objectForKey:#"aps"] objectForKey:#"alert"]]
delegate:self cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alertView show];
UIViewController *vc = self.window.rootViewController;
PushBildirimlerim *pvc = [vc.storyboard instantiateViewControllerWithIdentifier:#"PushBildirimlerim "];
[vc presentViewController:pvc animated:YES completion:nil];
}
}
My question is related with the iOS push notifications.

Answer 1

You may be having issues with the if (applicationIsActive) condition.
Put a breakpoint on -didReceiveRemoteNotification and see whether it executes in different scenarios and see if it goes within the if-condition.
(unrelated to a certain extent but worth checking) this question:
didReceiveRemoteNotification when in background
Note:
-didReceiveRemoteNotification will not execute if your app was (initially) closed and you clicked on the push notification to open the app.
This method executes when a push notification is received while the application is in the foreground or when the app transitions from background to foreground.
Apple Reference: https://developer.apple.com/documentation/uikit/uiapplicationdelegate
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.
...
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.
So... When the app is not running and a push notification is received, when the user clicks on the push notification, the app is launched and now... the push notification contents will be available in the -didFinishLaunchingWithOptions: method in it's launchOptions parameter.
In other words... -didReceiveRemoteNotification won't execute this time and you'll also need to do this:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//...
NSDictionary *userInfo = [launchOptions valueForKey:#"UIApplicationLaunchOptionsRemoteNotificationKey"];
NSDictionary *apsInfo = [userInfo objectForKey:#"aps"];
if(apsInfo) {
//there is some pending push notification, so do something
//in your case, show the desired viewController in this if block
}
//...
}
Also read Apple's Doc on Handling Local and Remote Notifications

Answer 2

There is an extra space in the identifier name. Remove it and try:
UIStoryboard *mainstoryboard = [UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil];
PushBildirimlerim* pvc = [mainstoryboard instantiateViewControllerWithIdentifier:#"PushBildirimlerim"];
[self.window.rootViewController presentViewController:pvc animated:YES completion:NULL];

Answer 3

In Swift 4
If you need to achieve the above case you have to handle 2 cases
When your app is in the background/Foreground state(if push
notification is not silenced)
When your app is in the inactive state
Here I am using category(built in parameter in the payload of push notification to identify the type of notification) if there are more than 1 type of notifications. In case you have only 1 type of notification then no need to check for the category.
So for handling the first case, the code is as follows in AppDelegate File
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
let userInfo = response.notification.request.content.userInfo
let title = response.notification.request.content.title
//Method- 1 -- By using NotificationCenter if you want to take action on push notification on particular View Controllers
switch response.notification.request.content.categoryIdentifier
{
case "Second":
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "SecondTypeNotification"), object: title, userInfo: userInfo)
break
case "Third":
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "ThirdTypeNotification"), object: title, userInfo: userInfo)
break
default:
break
}
///Method -2 --- Check the view controller at the top and then push to the required View Controller
if let currentVC = UIApplication.topViewController() {
//the type of currentVC is MyViewController inside the if statement, use it as you want to
if response.notification.request.content.categoryIdentifier == "Second"
{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: SecondViewController = storyboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
currentVC.navigationController?.pushViewController(vc, animated: true)
}
else if response.notification.request.content.categoryIdentifier == "Third"
{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: ThirdViewController = storyboard.instantiateViewController(withIdentifier: "ThirdViewController") as! ThirdViewController
currentVC.navigationController?.pushViewController(vc, animated: true)
}
}
completionHandler() }
For Method 1-
After which you have to add the observers in the default view controller as follows in viewDidLoad
NotificationCenter.default.addObserver(self,selector: #selector(SecondTypeNotification),
name: NSNotification.Name(rawValue: "SecondTypeNotification"),
object: nil)
NotificationCenter.default.addObserver(self,selector:#selector(ThirdTypeNotification),
name: NSNotification.Name(rawValue: "ThirdTypeNotification"),
object: nil)
For Method 1-
And also need two add the Notification observer function for adding actions to be executed with the same name used in Observer.
// Action to be taken if push notification is opened and observer is called while app is in background or active
#objc func SecondTypeNotification(notification: NSNotification){
DispatchQueue.main.async
{
//Land on SecondViewController
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: SecondViewController = storyboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
self.navigationController?.pushViewController(vc, animated: true)
}
}
#objc func ThirdTypeNotification(notification: NSNotification){
DispatchQueue.main.async
{
//Land on SecondViewController
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: ThirdViewController = storyboard.instantiateViewController(withIdentifier: "ThirdViewController") as! ThirdViewController
self.navigationController?.pushViewController(vc, animated: true)
}
}
So whenever a notification is opened when the app is in the foreground or background the above will execute and move to respective view controller according to the category in the payload.
Now the second case
We know that when the app is inactive the first function that will be called when the push notification is opened is
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
return true
}
So we have to check in this function whether the app is launched by opening push notification or by clicking the app icon. For this, there is a provision provided to us. The function will look as follows after adding the required code.
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
FirebaseApp.configure()
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)
}
// Register the notification categories.
application.registerForRemoteNotifications()
Messaging.messaging().delegate = self
/// Check if the app is launched by opening push notification
if launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] != nil {
// Do your task here
let dic = launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification] as? NSDictionary
let dic2 = dic?.value(forKey: "aps") as? NSDictionary
let alert = dic2?.value(forKey: "alert") as? NSDictionary
let category = dic2?.value(forKey: "category") as? String
// We can add one more key name 'click_action' in payload while sending push notification and check category for indentifying the push notification type. 'category' is one of the seven built in key of payload for identifying type of notification and take actions accordingly
// Method - 1
if category == "Second"
{
/// Set the flag true for is app open from Notification and on root view controller check the flag condition to take action accordingly
AppConstants.sharedInstance.userDefaults.set(true, forKey: AppConstants.sharedInstance.kisFromNotificationSecond)
}
else if category == "Third"
{
AppConstants.sharedInstance.userDefaults.set(true, forKey: AppConstants.sharedInstance.kisFromNotificationThird)
}
// Method 2: Check top view controller and push to required view controller
if let currentVC = UIApplication.topViewController() {
if category == "Second"
{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: SecondViewController = storyboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
currentVC.navigationController?.pushViewController(vc, animated: true)
}
else if category == "Third"
{
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: ThirdViewController = storyboard.instantiateViewController(withIdentifier: "ThirdViewController") as! ThirdViewController
currentVC.navigationController?.pushViewController(vc, animated: true)
}
}
}
return true
}
For Method 1-
After this, check these flags value in the default view controller in viewdidLoad as follows
if AppConstants.sharedInstance.userDefaults.bool(forKey: AppConstants.sharedInstance.kisFromNotificationSecond) == true
{
//Land on SecondViewController
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: SecondViewController = storyboard.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
self.navigationController?.pushViewController(vc, animated: true)
AppConstants.sharedInstance.userDefaults.set(false, forKey: AppConstants.sharedInstance.kisFromNotificationSecond)
}
if AppConstants.sharedInstance.userDefaults.bool(forKey: AppConstants.sharedInstance.kisFromNotificationThird) == true
{
//Land on SecondViewController
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc: ThirdViewController = storyboard.instantiateViewController(withIdentifier: "ThirdViewController") as! ThirdViewController
self.navigationController?.pushViewController(vc, animated: true)
AppConstants.sharedInstance.userDefaults.set(false, forKey: AppConstants.sharedInstance.kisFromNotificationThird)
}
This will achieve the goal to open a particular view controller when the push notification is opened.
You can go through this blog- How to open a particular View Controller when the user taps on the push notification received? for reference.

Answer 4

I was having same problem that when app is suspended/terminated and push notification arrives my app was only opening and not redirecting to specific screen corresponding to that notification the solution is,
in
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions this method the parameter launchOptions tells us if it has the notification by checking that we need to call the method to redirect to specific screen
the code is as below...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//your common or any code will be here at last add the below code..
NSMutableDictionary *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if (notification)
{
//this notification dictionary is same as your JSON payload whatever you gets from Push notification you can consider it as a userInfo dic in last parameter of method -(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
NSLog(#"%#",notification);
[self showOfferNotification:notification];
}
return YES;
}
then in the method showOfferNotification:notification you can redirect user to corresponding screen like...
//** added code for notification
-(void)showOfferNotification:(NSMutableDictionary *)offerNotificationDic{
//This whole is my coding stuff.. your code will come here..
NSDictionary *segueDictionary = [offerNotificationDic valueForKey:#"aps"];
NSString *segueMsg=[[NSString alloc]initWithFormat:#"%#",[segueDictionary valueForKey:#"alert"]];
NSString *segueID=[[NSString alloc]initWithFormat:#"%#",[offerNotificationDic valueForKey:#"id"]];
NSString *segueDate=[[NSString alloc]initWithFormat:#"%#",[offerNotificationDic valueForKey:#"date"]];
NSString *segueTime=[[NSString alloc]initWithFormat:#"%#",[offerNotificationDic valueForKey:#"time"]];
NSLog(#"Show Offer Notification method : segueMsg %# segueDate %# segueTime %# segueID %#",segueMsg,segueDate,segueTime,segueID);
if ([segueID isEqualToString:#"13"]){
NSString *advertisingUrl=[[NSString alloc]initWithFormat:#"%#",[offerNotificationDic valueForKey:#"advertisingUrl"]];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:segueMsg forKey:#"notificationMsg"];
[defaults setObject:segueDate forKey:#"notifcationdate"];
[defaults setObject:segueTime forKey:#"notifcationtime"];
[defaults setObject:advertisingUrl forKey:#"advertisingUrl"];
[defaults synchronize];
navigationController = (UINavigationController *)self.window.rootViewController;
UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle: nil];
FLHGAddNotificationViewController *controller = (FLHGAddNotificationViewController*)[mainStoryboard instantiateViewControllerWithIdentifier: #"offerViewController"];
[navigationController pushViewController:controller animated:YES];
}
}

Answer 5

when tap on notification
call notification delegate function
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
let nav = UINavigationController()
nav.navigationBar.isHidden = true
let first = Router.shared.splashVC()
let sceond = Router.shared.CustomTabbarVC()
let third = Router.shared.ProviderDetailsVC()
sceond.selectedIndex = 2
nav.viewControllers = [first,sceond,third]
UIApplication.shared.keyWindow?.rootViewController = nav
UIApplication.shared.keyWindow?.makeKeyAndVisible()
}