Topic
View lifecycle, rendering performance, diffable data sources, and the UIKit architecture trade-offs still common in production codebases.
Focus areas: View lifecycle, rendering, diffable data sources, and UIKit architecture
Follow a single tap from the button that was pressed up to the app delegate, and use that walk to explain first responder, nil-targeted actions, and why hit-testing is a separate step
Walk through every important UIViewController lifecycle callback, explain its purpose, show the call order with print(#function), and clarify where to put subview setup, constraints, and observation
Explain how frame and bounds describe the same view from two different coordinate systems, then connect that model to layout, transforms, and scrolling
