iOS / Swift / Swift values and SwiftUI ownership

iOS / Swift β€” Swift values and SwiftUI ownership

Optionals, value models, state identity, layout, drafts, and typed navigation.

6 lessons Β· No account required

What you will learn

  • Optionals, value models, state identity, layout, drafts, and typed navigation.

  1. Swift values, optionals, and the iOS host

    Establish language and platform boundaries, then handle absence without inventing a plausible domain value.

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  2. Value models, collections, and errors

    Use structs and enums to preserve invariants, and understand where collection copying stops protecting shared references.

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  3. SwiftUI state, bindings, and identity

    Treat views as descriptions and give editable state one owner that survives the intended view identity.

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  4. SwiftUI layout and stable lists

    Reason about proposed size, modifier order, Dynamic Type, and row identity instead of fixing one screenshot.

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  5. Forms, drafts, and validation

    Keep editing forgiving while creating explicit validated commands and preserving work through recoverable failures.

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  6. Navigation values and presentation

    Model destinations with stable values, keep route validation distinct from permission, and define cancellation explicitly.

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