Introduction to iOS 12



Xamarin's support for the iOS 12, tvOS 12, and watchOS 5 SDKs distributed with Xcode 10 is currently in preview, which means that that it may contain bugs, is not feature complete, and may change. Use it for experimentation only.

This document provides a high-level description of some iOS 12 APIs for which Xamarin's preview release provides C# bindings.

To get started building iOS 12 apps with Xamarin, take a look at:

ARKit 2

ARKit is the augmented reality framework included with iOS. ARKit 2 allows multiple users to interact with each other in an augmented reality scene, makes it possible to persist objects in space and return to them at a later time, and provides 2D image recognition and tracking and 3D object recognition. iOS 12 also provides AR Quick Look, a way to render usdz AR models in your apps.

Siri shortcuts

Siri shortcuts allow developers to more deeply integrate their applications with Siri. With Siri shortcuts, users can use voice commands to open content or kick off tasks in their apps. Siri will learn when certain shortcuts are more likely to be used and suggest them to the user via notifications.

Core ML 2

Core ML 2 reduces application size through model quantization and flexible models, improves application performance with a new batch prediction API, and uses custom models to support advances in machine learning.

Notification improvements

In iOS 12, grouped notifications make it possible to present user notifications in app or thread-related groupings. Summary text can be used to provide further information about a notification group.

Notification content extensions in iOS 12 allow for custom user interfaces and dynamic actions. These features enable richer, more relevant experiences in user notifications.

Natural Language framework

The Natural Language framework enables applications to perform various types of language analysis. For example, it can be used to identify parts of speech and determine the language represented by a block of text.


In iOS 12, third-party apps can deliver maps and turn-by-turn navigation instructions in CarPlay by using the new CarPlay framework.

Automatic strong passwords

iOS 12 will suggest and store usernames and strong passwords for applications containing a create account screen. The suggested passwords can be generated based on a default, 20-character format or based on developer-specified password rules. This feature makes use of associated domains and specified content types on new username and new password fields.

AutoFill Credential Provider Extensions

With iOS 12, third-party password manager applications can provide an extension to supply username and password values to login fields.

HealthKit updates

iOS 11.3 introduced Health Records, which allows users to download their health record information from various healthcare institutions and view it on their iOS devices. iOS 12 adds APIs that allow third-party applications to securely access this data.

iMessage App Presentation Contexts

In iOS 12, iMessage apps support presentation contexts, which allow the apps to run as a normal iMessage app or in the context of a photo or video effect.

Vision framework

The Vision framework includes an improved face detector that can detect faces in various orientations. Also, request revisions can now be used to select a specific Vision framework algorithm revision.