How to load viewController when user tap on notification in iOS Swift? - ios

Question

I have done push notification using FCM on the app side. When the user taps on the notification it navigates to specific viewController from the app side to custom SDK. I have tried many ways but viewController is not showing but all functionalities are loaded successfully.
1. First attempt: [Notification tap is detected and passed data from the app side to framework. Loaded particular viewController functionalities but viewController are not showing.]
When user tap notification from the app side, it will send data to the framework to show a particular viewController.
here is the code for the app side:
func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: #escaping () -> Void) {
if(application.applicationState == .active){
print("user tapped the notification bar when the app is in foreground")
let userInfo = response.notification.request.content.userInfo
// Print message ID.
if let messageID = userInfo[gcmMessageIDKey] {
print("Message ID: \(messageID)")
}
// Print full message.
print("didReceive notification tapped",userInfo)
TaskName = userInfo[taskName] as? String ?? ""
print("TaskName::::", TaskName ?? "")
ProcessInstanceId = userInfo[processInstanceId] as? String ?? ""
print("ProcessInstanceId::::", ProcessInstanceId ?? "")
processDefinitionName = userInfo[ProcessDefinitionId] as? String ?? ""
print("processDefinitionName::::", processDefinitionName ?? "")
TaskID = userInfo[taskId] as? String ?? ""
print("taskID::::", TaskID ?? "")
FormKey = userInfo[formKey] as? String ?? ""
print("FormKey::::", FormKey ?? "")
Types = userInfo[type] as? String ?? ""
print("Type::::", Types ?? "")
Title = userInfo[title] as? String ?? ""
print("Title::::", Title ?? "")
Body = userInfo[body] as? String ?? ""
print("Body::::", Body ?? "")
CreatedDate = userInfo[created] as? String ?? ""
print("created:::", CreatedDate ?? "")
AFlowBuilder(self).callFormView(taskName: TaskName ?? "", processInstanceID: ProcessInstanceId ?? "", ProcessDefinitionName: processDefinitionName ?? "", taskId: TaskID ?? "", formKey: FormKey ?? "", title: Title ?? "", type: Types ?? "", body: Body ?? "", created: CreatedDate ?? "", formStatus: false)
}
completionHandler()
}
Here is the code from the framework side:
private var taskViewNew: UIViewController?
public func callFormView(taskName: String, processInstanceID: String, ProcessDefinitionName: String, taskId: String, formKey: String, title: String, type: String, body: String, created: String, formStatus: Bool){
let newNotification = makeSaveNotification(taskName: taskName, processInstanceID: processInstanceID, ProcessDefinitionName: ProcessDefinitionName, taskId: taskId, formKey: formKey, title: title, type: type, body: body, created: created, formStatus: formStatus)
let realm = try! Realm()
// let realmData = realm.objects(NotificationRealmModel.self).filter("name = \(userNameRealm ?? "")").first!
try! realm.write {
realm.add(newNotification)
print("ream notification saved path url:: call form view", realm.configuration.fileURL ?? "")
}
let controller = CreateCardViewController()
let str = formKey
let result = String(str.dropFirst(7))
print(result)
let s = String(result.dropLast(10))
print("newFormKey call form view", s )
let v = convap(text: s)
controller.processInstanceId = processInstanceID
controller.cardName = ""
controller.TaskIdValue = taskId
controller.formKey = v
controller.tabName = "NotificationTapped"
controller.fullFormKey = formKey
self.taskViewNew?.addChild(controller)
self.taskViewNew?.view.addSubview(controller.view)
controller.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
// controller.didMove(toParent: taskViewNew)
taskViewNew?.present(controller, animated: true, completion: nil)
}
Second attempt: [Notification detected in the app side and passed value to viewController. And, Inside viewController framework method is called to load framework viewController but all functionality is loaded successfully but the view is not loaded]
Here is the code from the app side:
func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: #escaping () -> Void) {
if(application.applicationState == .active){
print("user tapped the notification bar when the app is in foreground")
let userInfo = response.notification.request.content.userInfo
// Print message ID.
if let messageID = userInfo[gcmMessageIDKey] {
print("Message ID: \(messageID)")
}
// Print full message.
print("didReceive notification tapped",userInfo)
TaskName = userInfo[taskName] as? String ?? ""
print("TaskName::::", TaskName ?? "")
ProcessInstanceId = userInfo[processInstanceId] as? String ?? ""
print("ProcessInstanceId::::", ProcessInstanceId ?? "")
processDefinitionName = userInfo[ProcessDefinitionId] as? String ?? ""
print("processDefinitionName::::", processDefinitionName ?? "")
TaskID = userInfo[taskId] as? String ?? ""
print("taskID::::", TaskID ?? "")
FormKey = userInfo[formKey] as? String ?? ""
print("FormKey::::", FormKey ?? "")
Types = userInfo[type] as? String ?? ""
print("Type::::", Types ?? "")
Title = userInfo[title] as? String ?? ""
print("Title::::", Title ?? "")
Body = userInfo[body] as? String ?? ""
print("Body::::", Body ?? "")
CreatedDate = userInfo[created] as? String ?? ""
print("created:::", CreatedDate ?? "")
}
window = UIWindow(frame: UIScreen.main.bounds)
let homeViewController = ViewController()
homeViewController.Body = Body
homeViewController.CreatedDate = CreatedDate
homeViewController.FormKey = FormKey
homeViewController.processDefinitionName = processDefinitionName
homeViewController.ProcessInstanceId = ProcessInstanceId
homeViewController.TaskID = TaskID
homeViewController.Title = Title
homeViewController.Types = Types
homeViewController.view.backgroundColor = UIColor.red
window!.rootViewController = homeViewController
window!.makeKeyAndVisible()
completionHandler()
}
Here is the code viewController from the app side, it will load the framework viewController method.
Attempt 1:
override func viewDidAppear(_ animated: Bool) {
let controller = CreateCardViewController()
let str = FormKey
let result = String(str?.dropFirst(7) ?? "")
print(result)
let s = String(result.dropLast(10))
print("newFormKey call form view", s )
let v = convap(text: s)
controller.processInstanceId = ProcessInstanceId
controller.cardName = ""
controller.TaskIdValue = TaskID
controller.formKey = v
controller.tabName = "NotificationTapped"
print(controller.tabName)
controller.fullFormKey = FormKey
add(asChildViewController: controller)
}
private func add(asChildViewController viewController: UIViewController) {
// Add Child View Controller
addChild(viewController)
// Add Child View as Subview
view.addSubview(viewController.view)
// Configure Child View
viewController.view.frame = view.bounds
viewController.view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
// Notify Child View Controller
viewController.didMove(toParent: self)
}
Attempt: 2
override func viewDidAppear(_ animated: Bool) {
print("Presenting next...")
let controller = CreateCardViewController()
let str = FormKey
let result = String(str?.dropFirst(7) ?? "")
print(result)
let s = String(result.dropLast(10))
print("newFormKey call form view", s )
let v = convap(text: s)
controller.processInstanceId = ProcessInstanceId
controller.cardName = ""
controller.TaskIdValue = TaskID
controller.formKey = v
controller.tabName = "NotificationTapped"
print(controller.tabName)
controller.fullFormKey = FormKey
present(controller, animated: true, completion: nil)
}
Any help much appreciated pls...

Answer 1

I have such task currently maybe it is a little bit simpler but this is my code:
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
if let navigationController = window?.rootViewController as? UINavigationController {
navigationController.popToRootViewController(animated: false)
if let someViewController = navigationController.storyboard?.instantiateViewController(withIdentifier: "SomeViewController") as? SomeViewController {
navigationController.pushViewController(someViewController, animated: true)
}
}
}
In my case, it works fine because I have UINavigationController as a root of my app, and I manage my navigation through it. This is important to be sure what you have on your stack of views right now and how to clear it.
Also, you can see that I use this line for instantiating my new ViewController
if let someViewController = navigationController.storyboard?.instantiateViewController(withIdentifier: "SomeViewController") as? SomeViewController
But this is not important, just be sure that your ViewController is correctly initiated.
Good luck.

Answer 2

I used the top view controller to present the desired view.
To fetch top view controller:
func topController() -> UIViewController {
if var topController = UIApplication.shared.keyWindow?.rootViewController {
while let presentedViewController = topController.presentedViewController {
topController = presentedViewController
}
return topController
}
return (UIApplication.shared.keyWindow?.rootViewController)!
}
Then on receiving notification:
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
print(userInfo)
guard Utility.shared.userInfo != nil else { return }
let vc : EventDetailVC = EVENTSSTORYBOARD.viewController(id: "EventDetailVC") as! EventDetailVC
vc.eventID = event_id
vc.eventType = EventType.Invite
let nav = UINavigationController(rootViewController: vc)
nav.modalPresentationStyle = .fullScreen
self.topController().present(nav, animated: true, completion: nil)
}
Let me know if it works for you.

Answer 3

Use NotificationCenter create a custom NSNotification.Name and subscribe your viewcontroller to the created notification name using
NotificationCenter.default.addObserver(self, selector: #selector(openView), name: <<custom notification name>>, object: nil)
after that using the selector function you can pass all the parameters to the view controller
#objc func openView(notification: Notification){}
and in didFinishLaunchingWithOptions post to the above custom notification using this
let userInfo = launchOptions?[UIApplication.LaunchOptionsKey.remoteNotification]
if (userInfo != nil){
DispatchQueue.main.asyncAfter(deadline: .now() + 0.9) {
NotificationCenter.default.post(name: <<custom notification name>>, object: nil, userInfo: userInfo as! [AnyHashable : Any]?)
}
}
if you have multiple viewcontrollers that needs to be open you can create a base view controller class and put above code in the base class and extend the viewcontrollers by the base class