The Coordinator pattern helps organize navigation flow in iOS apps. It does not directly affect frame rate or battery life but improves app responsiveness by reducing view controller complexity. This leads to smoother UI transitions and less memory overhead from tightly coupled view controllers.
Keep coordinators lightweight by avoiding heavy logic inside them. Delegate UI updates to view controllers. Use weak references to prevent retain cycles and memory leaks. Preload data asynchronously before navigation to avoid blocking the main thread during transitions.
The Coordinator pattern itself adds minimal code size. It can reduce startup time by simplifying initial view controller setup and deferring navigation logic until needed. This modular approach can improve maintainability and reduce code duplication, indirectly benefiting app size and load speed.
On iOS, the Coordinator pattern manages UIKit navigation flow, replacing complex view controller dependencies. Android uses different patterns like Navigation Component or Jetpack Compose navigation, which have built-in navigation graphs. Coordinators are less common on Android but the concept of separating navigation logic applies.
Apple requires apps to have smooth, crash-free navigation. Using the Coordinator pattern helps meet Human Interface Guidelines by keeping navigation clear and consistent. Ensure no memory leaks or retain cycles in coordinators to avoid app crashes, which can cause rejection.
Likely the coordinator is doing heavy work on the main thread during navigation, such as synchronous data loading or complex UI setup. Move data fetching off the main thread and simplify coordinator logic to improve load time.