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What’s New in 
 Push Notifications? @samjarman • Carnival.io

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@samjarman • #MobileRefresh Today 1. What’s new in notifications in iOS 10 and iOS 11 2. What’s new in notifications in Android O 3. Best practices for push notifications 4. AMA

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@samjarman • #MobileRefresh Tweeting is OK! • Encouraged, even! • Take photos, ask questions! • I’ll get back to you after the talk :)

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@samjarman • #MobileRefresh iOS 10 Changes

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@samjarman • #MobileRefresh Big iOS 10 Changes • Revamped, enhanced API • Notification Service Extensions • Notification Content Extensions

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@samjarman • #MobileRefresh Revamped API • UN* classes (User Notifications) • Same functionality + more • Robust API

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@samjarman • #MobileRefresh Notable Improvements • Manage remote notifications • Control foreground appearance • Inspect responses - dismissed? • Collapsible and threaded notifications

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@samjarman • #MobileRefresh Manage Remote Notifications • getDeliveredNotificationsWithCompletionHandler:
 - Provides you with a list of the app’s notifications that are still 
 displayed in Notification Center.
 • removeDeliveredNotificationsWithIdentifiers:
 - Removes the specified notifications from Notification Center.
 • removeAllDeliveredNotifications - Removes all of the app’s notifications from Notification Center.

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@samjarman • #MobileRefresh Foreground Notifications • userNotificationCenter:willPresentNotification
 :withCompletionHandler: - Called when a notification is delivered to a foreground app.
 • Options: Alert, Badge and Sound. 
 - Alert looks similar to regular alert boxes.
 • Good place to override system UI for your own… 
 (and update your app accordingly)

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@samjarman • #MobileRefresh User Action Handling • userNotificationCenter:didReceiveNotificationResponse:
 withCompletionHandler: - Called to let your app know which action was selected by 
 the user for a given notification.
 • UNNotificationResponse - DismissedAction and DefaultAction constants
 • UNTextInputNotificationResponse - Text typed in as property

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@samjarman • #MobileRefresh Collapsible Notifications • Done from your push provider. • Two/N consecutive notifications with the same collapse-id header. • Download additional content.

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@samjarman • #MobileRefresh Collapsible Notifications

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@samjarman • #MobileRefresh Threaded Notifications • More power than collapsible notifications • Set a thread-id in the header • Read that thread-id in a notification service extension • Implementing threading yourself

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@samjarman • #MobileRefresh New Extensions

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@samjarman • #MobileRefresh Notification Service Extensions • Called before the user is shown an alert. • Chance to modify content. • Download additional content.

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@samjarman • #MobileRefresh Notification Content Extension • Create your own UI for an extension. • Full storyboard access. • Non-interactive. • Format data in a readable, valuable way.

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@samjarman • #MobileRefresh Learn More • Sessions 707, 708 – WWDC 2016

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@samjarman • #MobileRefresh iOS 11 Changes

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@samjarman • #MobileRefresh Hidden Notification Content

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@samjarman • #MobileRefresh

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@samjarman • #MobileRefresh Hidden Notification Content Example

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@samjarman • #MobileRefresh

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@samjarman • #MobileRefresh Hidden Notification Content • Now available for all apps in iOS 11 • Important for privacy of the user - often notification content is sensitive • Users tweak per application, because some could 
 be more sensitive than others • Default hidden text is “Notification”

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@samjarman • #MobileRefresh Hidden Notification Content • You can define the hidden “default” text as a developer. • Respects thread-id if you’re using those and notification service extensions • Respects collapsible notifications • Supports notifications with images

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@samjarman • #MobileRefresh Notification Preview Placeholder let chatsCategory = UNNotificationCategory(identifier:"chats", actions: [], intentIdentifiers:[], hiddenPreviewsBodyPlaceholder:"New chat")

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@samjarman • #MobileRefresh String Formatters let chatsCategory = UNNotificationCategory(identifier:"chats", actions: [], intentIdentifiers:[], hiddenPreviewsBodyPlaceholder:”%u chats")

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@samjarman • #MobileRefresh Using StringsDict files

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@samjarman • #MobileRefresh StringsDict in use let chatsCategory = UNNotificationCategory(identifier:"chats", actions: [], intentIdentifiers:[], hiddenPreviewsBodyPlaceholder:NSLocalizedStrin g("COMMENTS_KEY", "comment placeholder")

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@samjarman • #MobileRefresh Title and Subtitle control let chatsCategory = UNNotificationCategory(identifier:"chats", actions: [], intentIdentifiers:[], hiddenPreviewsBodyPlaceholder:”%u chats”, options: [.hiddenPreviewsShowTitle, .hiddenPreviewsShow Subtitle])

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@samjarman • #MobileRefresh Learn more • http://carnival.io/mobile-insights/whats-new-ios-11-notifications/ • WWDC 2017 – Session 708

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@samjarman • #MobileRefresh Android O Changes

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@samjarman • #MobileRefresh Badges • Notification Dots • No numbers though Image from Ubergizmo

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@samjarman • #MobileRefresh Channels • Notifications now arrive in a given channel, in an optional group • End users can tweak notification settings per channel/group • Developers are encouraged to split notifications into logical channels/groups

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@samjarman • #MobileRefresh Channels

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@samjarman • #MobileRefresh Channels • Settings for each channel are exposed - Sound/Vibration
 - Importance
 - Light/LED colour
 - Bypass do not disturb mode
 - Lockscreen

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@samjarman • #MobileRefresh Channels Code Code examples: http://bit.ly/2xuLSnx

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@samjarman • #MobileRefresh Tips for Channels • Effort on all of us to educate consumers about these settings • Deep link to settings screen • Consider not exposing these settings in your own app to avoid confusion • Group into logical groups and channels • If targeting O, must use Channels
 - If not, you can use it without worrying

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@samjarman • #MobileRefresh Channels on… iOS? • iOS has Categories. • You can register Categories on launch, with buttons, text input, notification services and extensions. • Users not offered fine grain control over category alerts though. • Worth looking into, all new in iOS 8!

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@samjarman • #MobileRefresh Best Practices

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@samjarman • #MobileRefresh Notifications go to people, not devices.

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@samjarman • #MobileRefresh 71% of app uninstalls are triggered by 
 Push Notifications.

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@samjarman • #MobileRefresh Make them timely.

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@samjarman • #MobileRefresh Respect local timezones.

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@samjarman • #MobileRefresh Respect sleepy time.

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@samjarman • #MobileRefresh Respect back-off times. ✋

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@samjarman • #MobileRefresh Keep them relevant.

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@samjarman • #MobileRefresh Personalise based on journey.

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@samjarman • #MobileRefresh Personalise with names.

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@samjarman • #MobileRefresh Use Emoji.

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@samjarman • #MobileRefresh Use transactional push.

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@samjarman • #MobileRefresh Use precise language.

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@samjarman • #MobileRefresh Being a good citizen.

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@samjarman • #MobileRefresh Ask for permission… Carefully.

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@samjarman • #MobileRefresh ⚡ Pre-load content.

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@samjarman • #MobileRefresh Represent notifications inside your app.

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@samjarman • #MobileRefresh ⚙ Expose settings.

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@samjarman • #MobileRefresh Use a 3rd party push service. DIY at your own risk.

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@samjarman • #MobileRefresh PushNotifications.tips

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@samjarman • #MobileRefresh Conclusion • iOS 10 and 11 expose great new API • Android exposes awesome power, but users needs to be educated about it • Respect your users with notifications

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Thank You! Sam Jarman • iOS Developer, carnival.io • @samjarman

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AMA!