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iOS & Swift

SwiftUI, UIKit, Xcode, Swift language, Apple platforms

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Test yourself: Top 30 intermediate iOS & Swift interview questions →Multiple choice, with the correct answer and why it is correct on every question. Free, no sign-in.

Intermediate interview questions in iOS & Swift, page 4

intermediate1 min read

Generating Video Thumbnails with AVAssetImageGenerator

Load AVAsset, configure AVAssetImageGenerator, request the time off the main thread, hop back to update UI.

intermediate1 min read

setUp() and tearDown() in XCTestCase

SetUp builds fresh state before each test, tearDown cleans up after, ensuring independence.

intermediate1 min read

Making a Legacy UIViewController Testable

Extract logic into a testable view model, inject dependencies, keep the controller a thin humble object.

intermediate1 min read

Resolving Conflicting Transitive Versions in SPM

SPM allows only one version per package, so diagnose the graph, then update, pin, or fork to find an overlap.

intermediate1 min read

Decoupled Cross-Module Navigation in Modular iOS

Depend on a shared abstraction, register concrete routers in a coordinator or registry, resolve at runtime.

intermediate1 min read

XCFrameworks and Binary Distribution Trade-offs

XCFramework bundles slices for multiple platforms/architectures, used to hide source or speed builds.

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