🔸environment value

SwiftUI ⟩ view ⟩ environment ⟩ value

A defined collection of values related to a view.

• Some of these automatically reflect system state, user settings, or view state. Examples include the color scheme, text style, or focus state of the view.

• Others provide useful default values, such as a line limit for text fields.

// read the color scheme (an environment value) of the current view
@Environment(\.colorScheme) var colorScheme: ColorScheme

• Find many built-in environment values in EnvironmentValues.

• Create a custom EnvironmentValues property by:

  • defining a new property in an extension to the EnvironmentValues structure and

  • applying the Entry() macro to the variable declaration.

🔴 主題

• dismiss：An action that dismisses the current presentation.

📘 手冊