What is @state
Generated on 9/15/2024
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The concept of "state" is discussed in several sessions at WWDC 2024, particularly in the context of machine learning models and SwiftUI.
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Machine Learning Models: In the session "Bring your machine learning and AI models to Apple silicon," state is described as a persistent element that can be used across different runs of a model. This is particularly useful for stateful models, where the state can store information across different inference runs, such as in an accumulator example that keeps track of the summation of all historical inputs. Core ML now supports stateful models, allowing the model to automatically update state tensors without needing to define them as inputs or outputs. This leads to better performance and efficiency (Bring your machine learning and AI models to Apple silicon).
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SwiftUI: In the session "SwiftUI essentials," state is used to manage the internal data of a view. When a view property is marked as state, SwiftUI manages the storage and provides it back for the view to read and write. This allows for dynamic updates to the UI based on changes in the state, such as incrementing a value when a button is tapped (SwiftUI essentials).
These sessions highlight the importance of state in both machine learning and UI development, providing tools and frameworks to manage state efficiently.
Bring your machine learning and AI models to Apple silicon
Learn how to optimize your machine learning and AI models to leverage the power of Apple silicon. Review model conversion workflows to prepare your models for on-device deployment. Understand model compression techniques that are compatible with Apple silicon, and at what stages in your model deployment workflow you can apply them. We’ll also explore the tradeoffs between storage size, latency, power usage and accuracy.
SwiftUI essentials
Join us on a tour of SwiftUI, Apple’s declarative user interface framework. Learn essential concepts for building apps in SwiftUI, like views, state variables, and layout. Discover the breadth of APIs for building fully featured experiences and crafting unique custom components. Whether you’re brand new to SwiftUI or an experienced developer, you’ll learn how to take advantage of what SwiftUI has to offer when building great apps.
Deploy machine learning and AI models on-device with Core ML
Learn new ways to optimize speed and memory performance when you convert and run machine learning and AI models through Core ML. We’ll cover new options for model representations, performance insights, execution, and model stitching which can be used together to create compelling and private on-device experiences.
A Swift Tour: Explore Swift’s features and design
Learn the essential features and design philosophy of the Swift programming language. We’ll explore how to model data, handle errors, use protocols, write concurrent code, and more while building up a Swift package that has a library, an HTTP server, and a command line client. Whether you’re just beginning your Swift journey or have been with us from the start, this talk will help you get the most out of the language.