how doest he environment value isPresented work?
Asked on 2026-01-22
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The isPresented environment value is not directly mentioned in the provided context. However, the context does discuss how environment values work in SwiftUI, particularly in the session titled "Optimize SwiftUI performance with Instruments."
In SwiftUI, environment values are stored in a struct similar to a dictionary, and views access these values using the environment property wrapper. When an environment value is updated, views that depend on it are notified, and their body may need to run again if the value they are reading has changed. This mechanism helps manage updates efficiently, ensuring that views only update when necessary.
For more detailed information on how environment values work, you might want to check out the session Optimize SwiftUI performance with Instruments (19:54).
Work with windows in SwiftUI
Learn how to create great single and multi-window apps in visionOS, macOS, and iPadOS. Discover tools that let you programmatically open and close windows, adjust position and size, and even replace one window with another. We’ll also explore design principles for windows that help people use your app within their workflows.
Set the scene with SwiftUI in visionOS
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Optimize SwiftUI performance with Instruments
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