You can use UILocalNotification, old APIs also works fine with iOS10, but we had better use the APIs in the User Notifications framework instead. There are also some new features, you can only use with iOS10 User Notifications framework.

This also happens to Remote Notification, for more information: Here.

New Features:

1. Now you can either present alert, sound or increase badge while the app is in foreground too with iOS 10
2. Now you can handle all event in one place when user tapped (or slided) the action button, even while the app has already been killed.
3. Support 3D touch instead of sliding gesture.
4. Now you can remove specifical local notification just by one row code.
5. Support Rich Notification with custom UI.

It is really easy for us to convert UILocalNotification APIs to iOS10 User Notifications framework APIs, they are really similar.

I write a Demo here to show how to use new and old APIs at the same time: iOS10AdaptationTips .

For example,

With Swift implementation:

1. import UserNotifications

///    Notification become independent from UIKit
import UserNotifications

1. request authorization for localNotification

let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
    // Enable or disable features based on authorization.
}

1. schedule localNotification
2. update application icon badge number

@IBAction  func triggerNotification(){
    let content = UNMutableNotificationContent()
    content.title = NSString.localizedUserNotificationString(forKey: "Elon said:", arguments: nil)
    content.body = NSString.localizedUserNotificationString(forKey: "Hello Tom！Get up, let's play with Jerry!", arguments: nil)
    content.sound = UNNotificationSound.default()
    content.badge = UIApplication.shared().applicationIconBadgeNumber + 1;
    content.categoryIdentifier = "com.elonchan.localNotification"
    // Deliver the notification in five seconds.
    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 60.0, repeats: true)
    let request = UNNotificationRequest.init(identifier: "FiveSecond", content: content, trigger: trigger)

    // Schedule the notification.
    let center = UNUserNotificationCenter.current()
    center.add(request)
}

@IBAction func stopNotification(_ sender: AnyObject) {
    let center = UNUserNotificationCenter.current()
    center.removeAllPendingNotificationRequests()
    // or you can remove specifical notification:
    // center.removePendingNotificationRequests(withIdentifiers: ["FiveSecond"])
}

Objective-C implementation: