📦Anchor<T>

• Anchor<T> is an opaque type that holds a value of type T, and T can be either CGRect or CGPoint.

• use Anchor<CGRect> to access the bounds of a view,

• use Anchor<CGPoint> for other view properties such as top, topLeading, topTrailing, center, trailing, bottom, bottomLeading, bottomTrailing and leading.

這個物件其實是給 GeometryProxy 用的。 👉 詳見：Anchor Preferences

📗 參考

• SwiftUI Lab ⟩

  • Inspecting the View Tree – Part 2: AnchorPreferences

📘 手冊

• SwiftUI ⟩

  • View Modifiers ⟩

    • .anchorPreference(key:value:transform:)

  • Drawing and Animation ⟩

    • GeometryProxy ⟩

      • .subscript(_:)

    • Anchor (struct)

      • Anchor.Source (struct)

👥 相關

• Anchor Preferences

• GeometryProxy

• GeometryProxy+ext

• GeometryReader