iOS Swift Design Patterns

Use When

• Swift-idiomatic design patterns for iOS — VC containment to eliminate Massive ViewController, hand-rolled MVVM Observable binding without RxSwift, delegation naming conventions, associative storage for extension properties, constrained protocol...
• The task needs reusable judgment, domain constraints, or a proven workflow rather than ad hoc advice.

Do Not Use When

• The task is unrelated to ios-swift-design-patterns or would be better handled by a more specific companion skill.
• The request only needs a trivial answer and none of this skill's constraints or references materially help.

Required Inputs

• Gather relevant project context, constraints, and the concrete problem to solve; load references only as needed.
• Confirm the desired deliverable: design, code, review, migration plan, audit, or documentation.

Workflow