How to create local notifications

Question

How can I setup local notifications so that at the time I set  my app generates a notification alert with a customized message

User · Answer

Here is sample code for LocalNotification that worked for my project   Objective-C   This code block in AppDelegate file    -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions                launchOptions valueForKey UIApplicationLaunchOptionsLocalNotificationKey              Override point for customization after application launch          return YES                This code block is invoked when application is in foreground  active-mode    - void application  UIApplication   application didReceiveLocalNotification  UILocalNotification   notification            UIAlertView  notificationAlert     UIAlertView alloc  initWithTitle   Notification     message   This local notification           delegate nil cancelButtonTitle   Ok  otherButtonTitles nil  nil             notificationAlert show             NSLog   didReceiveLocalNotification            This code block in  m file of any ViewController   - IBAction startLocalNotification       Bind this method to UIButton action     NSLog   startLocalNotification         UILocalNotification  notification     UILocalNotification alloc  init       notification fireDate    NSDate dateWithTimeIntervalSinceNow 7       notification alertBody     This is local notification        notification timeZone    NSTimeZone defaultTimeZone       notification soundName   UILocalNotificationDefaultSoundName      notification applicationIconBadgeNumber   10         UIApplication sharedApplication  scheduleLocalNotification notification           The above code display an AlertView after time interval of 7 seconds when pressed on button that binds startLocalNotification If application is in background then it displays BadgeNumber as 10 and with default notification sound   This code works fine for iOS 7 x and below but for iOS 8 it will prompt following error on console      Attempting to schedule a local notification  with an alert but haven t received permission from the user to display alerts   This means you need register for local notification  This can be achieved using   if   UIApplication instancesRespondToSelector  selector registerUserNotificationSettings            application registerUserNotificationSettings  UIUserNotificationSettings settingsForTypes UIUserNotificationTypeAlert UIUserNotificationTypeBadge UIUserNotificationTypeSound categories nil        You can also refer blog for local notification   Swift   You AppDelegate swift file should look like this    func application application  UIApplication  didFinishLaunchingWithOptions launchOptions   NSObject  AnyObject    - gt  Bool              Override point for customization after application launch      application registerUserNotificationSettings UIUserNotificationSettings forTypes  UIUserNotificationType Sound   UIUserNotificationType Badge   UIUserNotificationType Alert  categories  nil        return true     The swift file  say ViewController swift  in which you want to create local notification should contain below code     MARK  - Button functions func buttonIsPressed sender  UIButton        println  buttonIsPressed function called   UIButton description           var localNotification   UILocalNotification       localNotification fireDate   NSDate timeIntervalSinceNow  3      localNotification alertBody    This is local notification from Swift 2 0      localNotification timeZone   NSTimeZone localTimeZone       localNotification repeatInterval   NSCalendarUnit CalendarUnitMinute     localNotification userInfo     Important   Data        localNotification soundName   UILocalNotificationDefaultSoundName     localNotification applicationIconBadgeNumber   5     localNotification category    Message       UIApplication sharedApplication   scheduleLocalNotification localNotification        MARK  - viewDidLoad  class ViewController  UIViewController        var objButton   UIButton                 override func viewDidLoad             super viewDidLoad                           objButton   UIButton buttonWithType  Custom  as  UIButton         objButton frame   CGRectMake 30  100  150  40          objButton setTitle  Click Me   forState   Normal          objButton setTitle  Button pressed   forState   Highlighted           objButton addTarget self  action   buttonIsPressed    forControlEvents   TouchDown                                      The way you use to work with Local Notification in iOS 9 and below is completely different in iOS 10   Below screen grab from Apple release notes depicts this     You can refer apple reference document for UserNotification   Below is code for local notification   Objective-C    In App-delegate h file use  import UserNotifications  App-delegate should conform to UNUserNotificationCenterDelegate protocol In didFinishLaunchingOptions use below code   UNUserNotificationCenter  center    UNUserNotificationCenter currentNotificationCenter    center requestAuthorizationWithOptions  UNAuthorizationOptionBadge   UNAuthorizationOptionSound   UNAuthorizationOptionAlert         completionHandler   BOOL granted  NSError    Nullable error                  if   error                      NSLog   request authorization succeeded                        self showAlert                        - void showAlert       UIAlertController  objAlertController    UIAlertController alertControllerWithTitle   Alert  message   show an alert   preferredStyle UIAlertControllerStyleAlert        UIAlertAction  cancelAction    UIAlertAction actionWithTitle   OK        style UIAlertActionStyleCancel handler   UIAlertAction  action            NSLog   Ok clicked                   objAlertController addAction cancelAction              UIApplication sharedApplication  windows  objectAtIndex 0  rootViewController  presentViewController objAlertController animated YES completion                            Now create a button in any view controller and in IBAction use below code    UNMutableNotificationContent  objNotificationContent     UNMutableNotificationContent alloc  init    objNotificationContent title    NSString localizedUserNotificationStringForKey     Notification     arguments nil    objNotificationContent body    NSString localizedUserNotificationStringForKey     This is local notification message    arguments nil    objNotificationContent sound    UNNotificationSound defaultSound       4  update application icon badge number objNotificationContent badge       UIApplication sharedApplication  applicationIconBadgeNumber    1       Deliver the notification in five seconds  UNTimeIntervalNotificationTrigger  trigger     UNTimeIntervalNotificationTrigger                                             triggerWithTimeInterval 10 f repeats NO           UNNotificationRequest  request    UNNotificationRequest requestWithIdentifier     ten                                                                               content objNotificationContent trigger trigger       3  schedule localNotification UNUserNotificationCenter  center    UNUserNotificationCenter currentNotificationCenter     center addNotificationRequest request withCompletionHandler   NSError    Nullable error        if   error            NSLog     Local Notification succeeded            else           NSLog     Local Notification failed                   Swift 3    In AppDelegate swift file use import UserNotifications Appdelegate should conform to UNUserNotificationCenterDelegate protocol In didFinishLaunchingWithOptions use below code      Override point for customization after application launch  let center   UNUserNotificationCenter current   center requestAuthorization options    alert   sound      granted  error  in        Enable or disable features based on authorization      if error    nil           print  Request authorization failed          else           print  Request authorization succeeded            self showAlert             func showAlert         let objAlert   UIAlertController title   Alert   message   Request authorization succeeded   preferredStyle  UIAlertControllerStyle alert       objAlert addAction UIAlertAction title   OK   style  UIAlertActionStyle default  handler  nil         self presentViewController objAlert  animated  true  completion  nil       UIApplication shared   keyWindow  rootViewController  present objAlert  animated  true  completion  nil     Now create a button in any view controller and in IBAction use below code    let content   UNMutableNotificationContent   content title   NSString localizedUserNotificationString forKey   Hello    arguments  nil  content body   NSString localizedUserNotificationString forKey   Hello message body   arguments  nil  content sound   UNNotificationSound default   content categoryIdentifier    notify-test   let trigger   UNTimeIntervalNotificationTrigger init timeInterval  5  repeats  false  let request   UNNotificationRequest init identifier   notify-test   content  content  trigger  trigger   let center   UNUserNotificationCenter current   center add request

User · Answer

iOS 8 users and above  please include this in App delegate to make it work   -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions       if   UIApplication instancesRespondToSelector  selector registerUserNotificationSettings                    application registerUserNotificationSettings  UIUserNotificationSettings settingsForTypes UIUserNotificationTypeAlert UIUserNotificationTypeBadge UIUserNotificationTypeSound categories nil               return YES      And then adding this lines of code would help   -  void applicationDidEnterBackground  UIApplication   application       UILocalNotification  notification     UILocalNotification alloc init       notification repeatInterval   NSDayCalendarUnit       notification setAlertBody   Hello world         notification setFireDate  NSDate dateWithTimeIntervalSinceNow 1         notification setTimeZone  NSTimeZone  defaultTimeZone         application setScheduledLocalNotifications  NSArray arrayWithObject notification

User · Answer

In appdelegate m file write the follwing code in applicationDidEnterBackground to get the local notification   -  void applicationDidEnterBackground  UIApplication   application      UILocalNotification  notification     UILocalNotification alloc init      notification repeatInterval   NSDayCalendarUnit      notification setAlertBody   Hello world        notification setFireDate  NSDate dateWithTimeIntervalSinceNow 1        notification setTimeZone  NSTimeZone  defaultTimeZone        application setScheduledLocalNotifications  NSArray arrayWithObject notification

User · Answer

-  void applicationDidEnterBackground  UIApplication   application      UILocalNotification  notification     UILocalNotification alloc init      notification repeatInterval   NSDayCalendarUnit      notification setAlertBody   Hello world        notification setFireDate  NSDate dateWithTimeIntervalSinceNow 1        notification setTimeZone  NSTimeZone  defaultTimeZone        application setScheduledLocalNotifications  NSArray arrayWithObject notification        This is worked  but in iOS 8 0 and later  your application must register for user notifications using - UIApplication registerUserNotificationSettings   before being able to schedule and present UILocalNotifications  do not forget this

User · Answer

I am assuming that you have requested for authorisation and registered your app for notification   Here is the code to create local notifications   available iOS 10 0         func send Noti                   Create content for your notification          let content   UNMutableNotificationContent           content title    Test          content body    This is to test triggering of notification             Use it to define trigger condition         var date   DateComponents           date calendar   Calendar current         date weekday   5   5 means Friday         date hour   14   Hour of the day         date minute   10   Minute at which it should be sent           let trigger   UNCalendarNotificationTrigger dateMatching  date  repeats  true          let uuid   UUID   uuidString         let req   UNNotificationRequest identifier  uuid  content  content  trigger  trigger           let notificationCenter   UNUserNotificationCenter current           notificationCenter add req     error  in             print error

User · Answer

Updated with Swift 5 Generally we use three type of Local Notifications    Simple Local Notification  Local Notification with Action Local Notification with Content   Where you can send simple text notification or with action button and attachment   Using UserNotifications package in your app  the following example  Request for notification permission  prepare and send notification as per user action AppDelegate itself  and use view controller listing different type of local notification test   AppDelegate  import UIKit import UserNotifications   UIApplicationMain class AppDelegate  UIResponder  UIApplicationDelegate  UNUserNotificationCenterDelegate        let notificationCenter   UNUserNotificationCenter current       var window  UIWindow        func application   application  UIApplication  didFinishLaunchingWithOptions launchOptions   UIApplication LaunchOptionsKey  Any    - gt  Bool              Confirm Delegete and request for permission         notificationCenter delegate   self         let options  UNAuthorizationOptions     alert   sound   badge          notificationCenter requestAuthorization options  options                 didAllow  error  in             if  didAllow                   print  User has declined notifications                                    return true            func applicationWillResignActive   application  UIApplication              func applicationDidEnterBackground   application  UIApplication              func applicationWillEnterForeground   application  UIApplication              func applicationWillTerminate   application  UIApplication              func applicationDidBecomeActive   application  UIApplication            UIApplication shared applicationIconBadgeNumber   0               MARK  Local Notification Methods Starts here        Prepare New Notificaion with deatils and trigger     func scheduleNotification notificationType  String               Compose New Notificaion         let content   UNMutableNotificationContent           let categoryIdentifire    Delete Notification Type          content sound   UNNotificationSound default         content body    This is example how to send     notificationType         content badge   1         content categoryIdentifier   categoryIdentifire            Add attachment for Notification with more content         if  notificationType     Local Notification with Content                         let imageName    Apple              guard let imageURL   Bundle main url forResource  imageName  withExtension   png   else   return               let attachment   try  UNNotificationAttachment identifier  imageName  url  imageURL  options   none              content attachments    attachment                     let trigger   UNTimeIntervalNotificationTrigger timeInterval  5  repeats  false          let identifier    Local Notification          let request   UNNotificationRequest identifier  identifier  content  content  trigger  trigger           notificationCenter add request     error  in             if let error   error                   print  Error   error localizedDescription                                       Add Action button the Notification         if  notificationType     Local Notification with Action                         let snoozeAction   UNNotificationAction identifier   Snooze   title   Snooze   options                  let deleteAction   UNNotificationAction identifier   DeleteAction   title   Delete   options    destructive               let category   UNNotificationCategory identifier  categoryIdentifire                                                    actions   snoozeAction  deleteAction                                                     intentIdentifiers                                                        options                  notificationCenter setNotificationCategories  category                          Handle Notification Center Delegate methods     func userNotificationCenter   center  UNUserNotificationCenter                                  willPresent notification  UNNotification                                  withCompletionHandler completionHandler   escaping  UNNotificationPresentationOptions  - gt  Void            completionHandler   alert   sound              func userNotificationCenter   center  UNUserNotificationCenter                                  didReceive response  UNNotificationResponse                                  withCompletionHandler completionHandler   escaping    - gt  Void            if response notification request identifier     Local Notification                print  Handling notifications with the Local Notification Identifier                     completionHandler             and ViewController  import UIKit  class ViewController  UIViewController  UITableViewDelegate  UITableViewDataSource        var appDelegate   UIApplication shared delegate as  AppDelegate     let notifications     Simple Local Notification                             Local Notification with Action                             Local Notification with Content         override func viewDidLoad             super viewDidLoad                 MARK  - Table view data source       func tableView   tableView  UITableView  numberOfRowsInSection section  Int  - gt  Int           return notifications count             func tableView   tableView  UITableView  cellForRowAt indexPath  IndexPath  - gt  UITableViewCell           let cell   tableView dequeueReusableCell withIdentifier   Cell   for  indexPath          cell textLabel  text   notifications indexPath row          return cell             func tableView   tableView  UITableView  didSelectRowAt indexPath  IndexPath            let notificationType   notifications indexPath row          let alert   UIAlertController title                                            message   After 5 seconds     notificationType     will appear                                         preferredStyle   alert          let okAction   UIAlertAction title   Okay  I will wait   style   default     action  in             self appDelegate  scheduleNotification notificationType  notificationType                    alert addAction okAction          present alert  animated  true  completion  nil

User · Answer

- void kundanselect       NSMutableArray  allControllers     NSMutableArray alloc  initWithArray self navigationController viewControllers       NSArray  allControllersCopy    allControllers copy       if    allControllersCopy lastObject  isKindOfClass   kundanViewController class                     NSNotificationCenter defaultCenter postNotificationName   kundanViewControllerHide object nil userInfo nil             else                 NSUserDefaults standardUserDefaults  setInteger 4 forKey   selected             self performSegueWithIdentifier   kundansegue  sender self               NSNotificationCenter defaultCenter addObserver self selector  selector ApparelsViewControllerHide  name   ApparelsViewControllerHide  object nil

User · Answer

Creating local notifications are pretty easy  Just follow these steps     On viewDidLoad   function ask user for permission that your apps want to display notifications  For this we can use the following code    UNUserNotificationCenter current   requestAuthorization options    alert   sound   badge   completionHandler   didAllow  error in     Then you can create a button  and then in the action function you can write the following code to display a notification      creating the notification content let content   UNMutableNotificationContent      adding title  subtitle  body and badge content title    Hey this is Simplified iOS  content subtitle    iOS Development is fun  content body    We are learning about iOS Local Notification  content badge   1    getting the notification trigger   it will be called after 5 seconds let trigger   UNTimeIntervalNotificationTrigger timeInterval  5  repeats  false     getting the notification request let request   UNNotificationRequest identifier   SimplifiedIOSNotification   content  content  trigger  trigger     adding the notification to notification center UNUserNotificationCenter current   add request  withCompletionHandler  nil   Notification will be displayed  just click on home button after tapping the notification button  As when the application is in foreground the notification is not displayed  But if you are using iPhone X  You can display notification even when the app is in foreground  For this you just need to add a delegate called UNUserNotificationCenterDelegate   For more details visit this blog post  iOS Local Notification Tutorial

[ios] How to create local notifications?

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